Bottom Polisher – Diamond Processing
SECTOR: GEMS & JEWELLERY
SUB-SECTOR: Diamond processing
OCCUPATION: Faceting and polishing
REFERENCE ID: G&J/Q4703
ALIGNED TO: NCO-2015/NIL
Brief Job Description: The individual, undertaking this job work with bottom doptang system, will make 24 bottom facets of a diamond by polishing it on the
polishing wheel or scaife in order to yield maximum brilliance and symmetry. For
polishing, the stone is set either in a lead dop or a mechanical-clamp and held
down on a revolving cast-iron scaife (horizontal and circular disc) charged with
diamond dust. Also known as Taliya Karigar or Bottom Worker/Polisher, the
bottom polisher creates the bottom facets of a diamond.
Personal Attributes: The job requires the individual to have: attention to details;
good eyesight; steady hands; ability to work in a process driven team; ability to
work for long hours in sitting position on a bench or the floor; and a lot of
patience.
Keywords /Terms Description
Sector Sector is a conglomeration of different business operations having similar
business and interests. It may also be defined as a distinct subset of the economy
whose components share similar characteristics and interests.
Sub-sector Sub-sector is derived from a further breakdown based on the characteristics and
interests of its components.
Occupation Occupation is a set of job roles, which perform similar/ related set of functions
in an industry.
Job role Job role defines a unique set of functions that together form a unique
employment opportunity in an organization.
Occupational Standards
(OS)
OS specify the standards of performance an individual must achieve when
carrying out a function in the workplace, together with the knowledge and
understanding they need to meet that standard consistently. Occupational
Standards are applicable both in the Indian and global contexts.
Performance Criteria Performance criteria are statements that together specify the standard of
performance required when carrying out a task.
National Occupational
Standards (OS)
NOS are occupational standards which apply uniquely in the Indian context.
Qualifications Pack (QP) QP comprises the set of OS, together with the educational, training and other
criteria required to perform a job role. A QP is assigned a unique qualifications
pack code.
Unit Code Unit code is a unique identifier for an Occupational Standard, which is denoted
by an ‘N’
Unit Title Unit title gives a clear overall statement about what the incumbent should be
able to do.
Description Description gives a short summary of the unit content. This would be helpful to
anyone searching on a database to verify that this is the appropriate OS they are
looking for.
Scope Scope is a set of statements specifying the range of variables that an individual
may have to deal with in carrying out the function which have a critical impact
on quality of performance required.
Knowledge and
Understanding
Knowledge and understanding are statements which together specify the
technical, generic, professional and organizational specific knowledge that an
individual needs in order to perform to the required standard.
Organizational Context Organizational context includes the way the organization is structured and how
it operates, including the extent of operative knowledge managers have of their
relevant areas of responsibility.
Technical Knowledge Technical knowledge is the specific knowledge needed to accomplish specific
designated responsibilities.
Core Skills/ Generic
Skills
Core skills or generic skills are a group of skills that are the key to learning and
working in today’s world. These skills are typically needed in any work
environment. In the context of the OS, these include communication related
skills that are applicable to most job roles.
Keywords /Terms Description
NOS National Occupational Standard(s)
NSQF National Skills Qualifications Framework
QP Qualifications Pack
Unit Code G&J/N4701
Unit Title
(Task) Fix diamond in the pot
Description This OS unit is about fixing bruted/blocked diamond in the pot with accurate
alignment
Scope This unit/task covers the following:
Collecting the bruted/blocked diamond packet from the supervisor
Fixing the bruted /blocked diamond on the pot
Achieving productivity
Maintaining quality of output
Performance Criteria(PC) w.r.t. the Scope
Element Performance Criteria
Collecting the
bruted/blocked diamond
packet from supervisor
To be competent, the user/individual on the job must be able to:
PC1. match the specifications of the diamonds such as shape, size and
quantity, as per those mentioned on the packet issued
Fixing the bruted
/blocked diamond on the
pot
PC2. ensure accurate fixing of diamond as per the polish required
PC3. ensure accurate alignment and levelling the diamond on the dop
Achieving productivity PC4. achieve the productivity in terms of carats or number of pieces as set by
the company
PC5. ensure timely delivery for further processing
Maintaining quality of
output
PC6. ensure no damage to the diamond is caused during fixing process
PC7. ensure no breakage of diamond while placing the cover in the press
Knowledge and Understanding (K)
A. Organizational
Context
The user/individual on the job needs to know and understand:
KA1. Company’s policies on: quality and delivery standards, safety and
hazards, integrity and personnel management
KA2. Non–disclosure of “confidential information” provided by the company
either orally or in writing marked as confidential
KA3. Liability arising out of loss, theft, or inadvertent disclosure of confidential
information
KA4. Work flow involved in company’s diamond processing process
KA5. Importance of the individual’s role in the workflow
KA6. Reporting structure
KA7. Issue return procedures followed by the company
B. Technical
Knowledge
The user/individual on the job needs to know and understand:
KB1. Shape, cut, clarity, carat, and physical characteristics of the diamond
KB2. Techniques of fixing of diamonds on pot
KB3. Potential work hazards
KB4. Use of an eye glass in order to check alignment
Skills (S) [Optional]
A. Core Skills/ Generic
Skills
Writing Skills
The user/ individual on the job needs to know and understand how:
SA1. To Fill requisition slip for ordering consumables
Reading Skills
SA2. To read descriptions on the diamond packets/ bags
SA3. To document work done for status and performance appraisal
Oral Communication (Listening and Speaking skills)
SA4. To discuss task, schedules, and work-loads with co-workers and
supervisors
SA5. To understand instructions and report problems to supervisor
B. Professional Skills Decision Making
The user/ individual on the job needs to know and understand how:
SB1. Decide the plan for fixing the diamond on dop using lac or sticking
cement
Plan and Organize
SB2. Plan work for maximum productivity
Customer Centricity
N.A.
Problem Solving
SB3. To resolve the issues with the quality of the pot / cover being used
SB4. To resolve issues about mismatch of diamonds issued or received
Analytical Thinking
N.A.
Critical Thinking
SB5. To spot process disruptions and delays
Unit Code G&J/N4703
Unit Title
(Task) Make bottom facets on diamond
Description This OS unit is about creating 24 bottom facets on diamond in the proportion,
symmetry and finish as per the planning or the objective fixed by the company
Scope This unit/task covers the following:
Maintaining quality of polish
Achieving productivity
Controlling defects
Performance Criteria(PC) w.r.t. the Scope
Element Performance Criteria
Maintaining quality
of polish
To be competent, the user/individual on the job must be able to:
PC1. achieve accurate proportion and symmetry of the facets as per design
requirement
PC2. achieve finish and brilliance of the facets as planned
PC3. remove all the inclusions while polishing as per plan
PC4. setup the bench/mill without vibration and level all its parts correctly
PC5. achieve a cut grading up to the required standards
PC6. ensure accurate bagging and labelling of the diamonds before returning
Achieving
Productivity
PC7. achieve the productivity in terms of carats or number of pieces as set by the
company
PC8. achieve timely delivery for further processing
Controlling Defects PC9. ensure no flaws are caused due to faulty polishing such as extra facets,
natural surface, nicks, scratches, polish lines, burning marks, abrasions
PC10. ensure no breakage of culet point
PC11. minimize damage, weight loss and breakage
PC12. repair a damaged stone
Knowledge and Understanding (K)
A. Organizational
Context
The individual on the job needs to know and understand:
KA1. Company’s policies on: acceptable limits of weight loss; incentives; delivery
standards; safety practices and hazards; security and performance
measurement
KA2. Work flow involved in company’s diamond processing process
KA3. Importance of the individual’s role in the workflow
KA4. Reporting structure
KA5. Issue return procedures followed by the company
KA6. Typical customer profile and market trends
KA7. Specialization area of the company (size, clarity, shape, quality, etc. of
diamonds)
KA8. Diamond processing objective of the company, e.g. maximizing yield,
maximizing clarity, etc
B. Technical
Knowledge
The individual on the job needs to know and understand:
KB1. Blocking procedure of diamonds
KB2. Bruting and coning
KB3. Polishing process
KB4. 4Cs of diamond (colour, cut, clarity and carat)
KB5. Use of various scopes in diamond processing
KB6. Stress (tension) of the diamond
KB7. Using proportion and symmetry analyzer machine
KB8. Geometry to understand the angles and symmetry
KB9. Direction of the tang and using the data system on the tang
KB10. Process of preparation of scaife
KB11. Level of fluorescence and its treatments
KB12. Repair work
KB13. Valuation of diamonds depending on different dimensions
KB14. Assembly of different parts of the bench
KB15. levelling the scaife and plate
KB16. Levelling the tang
KB17. To know uses of different types of tools and materials for different purposes
and end results
KB18. To know how to maintain and prepare the tools as per job requirement
KB19. To know potential work hazards, particularly, when using machine tools
Skills (S) [Optional]
A. Core Skills/
Generic Skills
Writing Skills
The user/individual on the job needs to know and understand how:
SA1. To document work done for status and performance appraisal
Reading Skills
SA2. To read descriptions on the job packets/ bags
SA3. To read the dimensions specified by the proportion analyser machine
Oral Communication (Listening & Speaking skills)
SA4. To discuss task, schedules, and work-loads with co-workers and supervisors
SA5. To understand instructions and report problems
B. Professional Skills Decision Making
The user/individual on the job needs to know and understand how:
SB1. To work on dimensions mentioned on the job packet, in order to achieve
perfect proportion and symmetry as required by design
Plan and Organize
SB2. To plan work for maximum productivity
SB3. To plan the best cut to get maximum value from the diamond
Problem Solving
SB4. Deliver bottom polished diamond on time by reporting problems faced or
anticipated well in advanced
Analytical Thinking
SB5. Identify root causes and effects that affect quality and productivity
Critical Thinking
SB6. To spot process disruptions and delays
Unit Code G&J/N9901
Unit Title
(Task) Coordinate with others
Description This OS unit is about communicating with colleagues, seniors and outside parties in
order to achieve the deliverables on schedule
Scope This unit/task covers the following:
Interacting with supervisor
Interacting with colleagues within and outside the department
Interacting with outside parties
Performance Criteria(PC) w.r.t. the Scope
Element Performance Criteria
Interacting with
supervisor
To be competent, the user/individual on the job must be able to:
PC1. coordinate for receiving work instructions and raw materials from reporting
supervisor
PC2. communicate to the reporting supervisor about process flow improvements,
product defects received from previous process, repairs and maintenance of
tools and machinery as required
PC3. communicate to reporting supervisor about operation details and hazards
PC4. interact with supervisor regarding compliance of company policy and rules
Interacting with
colleagues and other
departments
PC5. coordinate with colleagues to share work, as per the workload
PC6. communicate and discuss work flow related difficulties in order to find
solutions with mutual agreement
PC7. coordinate and receive feedback from quality control department
PC8. coordinate for putting team goals over individual goals
PC9. resolve conflicts by communicating with colleagues and other departments
PC10. coordinate with colleagues regarding multitasking in other departments with
requirements
Interacting with
outside parties
PC11. adhere to nondisclosure policy of the company in all outside coordination
Knowledge and Understanding (K)
A. Organizational
Context
The user/individual on the job needs to know and understand:
KA1. Company’s policies on: preferred language of communication, reporting and
escalation policy, quality delivery standards, and personnel management
KA2. Company’s policies on non-disclosure of “confidential information” provided
by the company either orally or in writing marked as confidential
KA3. Liability arising out of loss, theft, or inadvertent disclosure of confidential
information
KA4. Reporting structure
The user/individual on the job needs to know and understand:
KB1. Various categories of people that one is required to communicate and
coordinate within the organization
KB2. Importance of effective communication in the workplace
KB3. Importance of teamwork in organization and individual success
KB4. Various components of effective communication
KB5. Key elements of active listening
KB6. Barriers to effective communication
KB7. Importance of avoiding casual expletives and unpleasant terms while
communicating professional circles
KB8. Common reasons for interpersonal conflict
KB9. Expressing and addressing grievances appropriately and effectively
KB10. What constitutes disciplined behavior for a working professional
Skills (S) [Optional]
A. Core Skills/
Generic Skills
Writing Skills
The user/ individual on the job needs to know and understand how to:
SA1. Write instructions, remarks, job sheets, basic information, technical details
etc. in preferred local language of communication and English.
Reading Skills
SA2. Read preferred language of communication as prescribed by the company
SA3. Read job sheets and interpret technical details mentioned in the job sheet
Oral Communication (Listening and Speaking skills)
SA4. Discuss task lists, schedules, and work-loads with co-workers
SA5. Be a good listener
SA6. Be effective in communicating the issues faced to the supervisor
SA7. Avoid using jargon, slang or acronyms when communicating
B. Professional Skills Decision Making
The user/ individual on the job needs to know and understand how to:
SB1. Spot and communicate potential areas of disruptions to work process and
report the same
SB2. Report to supervisor and or to deal with a colleague individually, depending
on the type of concern
Plan and Organize
SB3. Collate information and communicate in a manner that is clear and
comprehensive to colleagues and supervisor
SB4. Convey accurate information to all internal as well as external customers (or
right information to right person)
Problem Solving
SB5. How to handle critical situations caused due to communication issues at
workplace and solve problems without blaming others
Analytical Thinking
SB6. Analyse the work processes by interacting with others and adopting best
practices
SB7. Use prior experience to observe and reflect for development of ideas
Critical Thinking
SB8. Think through the problem, evaluate the possible solution(s) and suggest an
optimum /best possible solution(s)
SB9. Deal with clients lacking the technical background to solve the problem on
their own
SB10. Spot process disruptions and delays and report and communicate with
solutions
SB11. Identify immediate or temporary solutions to resolve delays
SB12. Apply, analyze, and evaluate the information gathered from observation,
experience, reasoning, or communication, as a guide to thought and action
Unit Code G&J/N9902
Unit Title
(Task) Maintain health and safety at workplace
Description This OS unit is about being aware of, communicating and taking steps towards
minimizing potential hazards and dangers of accidents on the job and maintaining
health and safety
Scope This unit/task covers the following:
Health and safety in work area
Fire safety
Emergencies, rescue and first aid procedures
Performance Criteria(PC) w.r.t. the Scope
Element Performance Criteria
Health and safety in
work area
To be competent, the user/individual on the job must be able to:
PC1. identify and use appropriate protective clothing/equipment for specific tasks
and work
PC2. identify hazardous job activities in his/her job and communicate the possible
causes of risks or accidents in the workplace
PC3. carry out safe working practices while dealing with hazards to ensure safety
of self and others
PC4. identify and avoid doing any tasks or activities in a bad working position
PC5. practice appropriate working postures to minimise occupational health
related issues
Fire safety PC6. use the appropriate fire extinguishers on different types of fire
PC7. demonstrate rescue techniques applied during fire hazard
PC8. demonstrate good housekeeping in order to prevent fire hazards
PC9. demonstrate the correct use of any fire extinguisher
Emergencies, rescue
and first aid
procedures
PC10. administer appropriate first aid procedure to victims wherever required eg.in
case of bleeding, burns, choking, electric shock etc.
PC11. respond promptly and appropriately to an accident situation or medical
emergency
PC12. participate in emergency procedures such as raising alarm, safe evacuation,
correct means of escape, correct assembly point etc.
Knowledge and Understanding (K)
A. Organizational
Context
The user/individual on the job needs to know and understand:
KA1. Company’s policies on: safety and hazards and personnel management
KA2. Names and location of documents that refer to health and safety in work
place
KA3. Reporting structure
B. Technical
Knowledge
The user/individual on the job needs to know and understand:
KB1. Meaning of “hazards” and risks
KB2. Health and safety hazards commonly present in the work place and related
precautions
KB3. Various dangers associate with use of electrical equipment
KB4. Preventative and remedial actions to be taken in case of exposure to toxic
material
KB5. Methods of accident prevention
KB6. How different chemicals react and what could be the danger from them
KB7. How to use machines and tools without causing any harm to the body
KB8. Importance of using protective clothing/ equipment while working
KB9. Precautionary activities to prevent the fire accident
KB10. Various causes of fire
KB11. Techniques of using different fire extinguishers
KB12. Different material s materials used for extinguishing fire
KB13. Rescue techniques applied during a fire hazard
KB14. Various types of safety signs and what they mean
KB15. Appropriate basic first aid treatment relevant to condition e.g. bleeding minor
burns eye injuries
KB16. Potential impact to a person who is moved incorrectly
Skills (S) [Optional]
A. Core Skills/
Generic Skills
Writing Skills
The individual on the job needs to know and understand how to:
N.A.
Reading Skills
SA1. Read and comprehend basic content to read labels, charts, signage’s
SA2. Read and comprehend basic English to read manuals of operations
Oral Communication (Listening and Speaking skills)
SA3. Effectively communicate the risk of not following safety measures
B. Professional Skills Decision Making
The individual on the job needs to know and understand how to:
SB1. Report potential sources of danger
SB2. Follow the relevant prescribed procedure in the event of an accident
SB3. Wear appropriate safety gear to avoid an accident
Plan and Organize
SB4. Learn from past mistakes regarding use of hazardous machines or chemicals
Problem Solving
SB5. Adhere to and guide others to follow prescribed procedures related to health
and safety
Analytical Thinking
SB6. Analyse untoward incidents from the past and implement correct use of
machines, tools or hazardous chemicals
Critical Thinking
SB7. Critically analyse the processes carried out by self and by colleagues in the
department to spot potential hazards and safety issues
Criteria For Assessment Of Trainees
Job Role Bottom Polisher – Diamond Processing
Qualification Pack G&J/Q4703
Sector Skill Council Gem & Jewellery
Guidelines for Assessment
- Criteria for assessment for each Qualification Pack will be created by the Sector Skill Council. Each Performance
Criteria (PC) will be assigned marks proportional to its importance in NOS. SSC will also lay down proportion of
marks for Theory and Skills Practical for each PC. - The assessment for the theory part will be based on knowledge bank of questions created by the SSC.
- Assessment will be conducted for all compulsory NOS, and where applicable, on the selected elective/option
NOS/set of NOS. - Individual assessment agencies will create unique question papers for theory part for each candidate at each
examination/training center (as per assessment criteria below). - Individual assessment agencies will create unique evaluations for skill practical for every student at each
examination/training center based on this criterion. - To pass the Qualification Pack , every trainee should score a minimum of 50% of aggregate marks to successfully
clear the assessment. - In case of unsuccessful completion, the trainee may seek reassessment on the Qualification Pack.
