SAQA

All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.

SOUTH AFRICAN QUALIFICATIONS AUTHORITY

REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE:

Make a model and determine the optimal processing of a diamond gemstone

SAQA US ID	UNIT STANDARD TITLE
110235	Make a model and determine the optimal processing of a diamond gemstone
ORIGINATOR
SGB Mining and Minerals
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-
FIELD			SUBFIELD
Field 06 - Manufacturing, Engineering and Technology			Fabrication and Extraction
ABET BAND	UNIT STANDARD TYPE	PRE-2009 NQF LEVEL	NQF LEVEL	CREDITS
Undefined	Regular	Level 6	Level TBA: Pre-2009 was L6	13
REGISTRATION STATUS		REGISTRATION START DATE	REGISTRATION END DATE	SAQA DECISION NUMBER
Passed the End Date - Status was "Registered"		2003-12-03	2006-12-03	SAQA 0151/03
LAST DATE FOR ENROLMENT		LAST DATE FOR ACHIEVEMENT
2007-12-03		2010-12-03

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.

This unit standard does not replace any other unit standard and is not replaced by any other unit standard.

PURPOSE OF THE UNIT STANDARD

This unit standard will be useful to people who are required to determine the optimal method of processing diamond gemstones where weight loss is critical to the value of the polished gemstone.

People credited with this unit standard are able to

Explain the circumstances when it is appropriate to use model making to determine the method of processing of a diamond gemstone.

Describe the materials, equipment and tools used in making models of diamond gemstones.

Construct a mould and make models.

Cut and/or polish the model to determine the optimal method of processing the diamond gemstone

Conduct post-model-making activities.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

The credit calculation is based on the assumption that learners are already competent in terms of the following outcomes or areas of learning when starting to learn towards this unit standard:

Use a loupe to examine a diamond gemstone

Identify polishing grains and planes in diamond gemstones.

Explain the requirements for security of diamonds

Design and mark diamond gemstones for parting.

UNIT STANDARD RANGE

The conversion of rough diamond gemstones into cut and polished diamond gemstones for sale into local and international markets.

Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

Explain the circumstances when it is appropriate to use model making.

OUTCOME NOTES

Explain the circumstances when it is appropriate to use model making to determine the method of processing of a diamond gemstone.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The reasons when making a model is the appropriate method to determine the optimal way to process a diamond gemstone are explained in terms of the critical elements of the diamond gemstone.

ASSESSMENT CRITERION 2

2 . The reasons why model making assists in the decision about how to process the diamond gemstone is explained in terms of shapes, processing options and methodology of polishing.

ASSESSMENT CRITERION 3

3. The critical elements that should be taken into account when deciding to make models are explained in terms of cost, productivity and product value.

SPECIFIC OUTCOME 2

Describe the materials, equipment and tools used in making models of diamond gemstones.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The materials, equipment and tools used in making moulds are described in terms of key features and application.

ASSESSMENT CRITERION 2

2. The materials, equipment and tools used in making and fashioning models of diamond gemstones are described in terms of key features and application.

ASSESSMENT CRITERION 3

3. The requirements of health and safety when constructing models are explained in relation to hazardous materials and the appropriate precautions that should be taken.

ASSESSMENT CRITERION 4

4. The properties of the materials that the model will be made out of are explained and the treatment of them explained in terms of processing techniques and the resultant model.

ASSESSMENT CRITERION NOTES

Note to assessors The materials used may differ from workplace to workplace and the formula used may be a trade secret. This has to be respected, but the candidate must be aware of the treatment (e g heat or setting time) and the properties (e g elasticity and ductability) of the material both before and after making the model.

ASSESSMENT CRITERION 5

5. The importance of good housekeeping is explained in terms of health, safety, the environment, the diamond gemstone and care of equipment.

SPECIFIC OUTCOME 3

Construct a mould and make models.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The material to make the mould of the diamond gemstone is prepared according to workplace specific requirements.

ASSESSMENT CRITERION 2

2. The mould is made around the diamond gemstone to ensure that an accurate replica of the shape of the diamond gemstone is reproduced.

ASSESSMENT CRITERION 3

3. The mould is removed and checked to ensure that it will accurately replicate the diamond gemstone.

ASSESSMENT CRITERION 4

4. The material to make the model of the diamond gemstone is prepared according to workplace specific requirements.

ASSESSMENT CRITERION 5

5. The proto-type model is made and dimensions checked to ensure that the mould has provided an accurate replica.

ASSESSMENT CRITERION 6

6. The number of models is made according to workplace specific requirements.

ASSESSMENT CRITERION 7

7. The representations of imperfections are added to or inserted into the model according to workplace specific requirements.

SPECIFIC OUTCOME 4

Cut and/or polish the model to determine the optimal method of processing the diamond gemstone.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The appropriate materials and equipment for cutting and/or polishing the model are selected and prepared according to workplace specific requirements.

ASSESSMENT CRITERION 2

2. The fashioning of the model is carried out in the pre-determined sequence and the effects are continuously monitored with regard to the critical shape or weight of the diamond gemstone.

ASSESSMENT CRITERION 3

3. The result of each experiment on the model is described in the documentation according to workplace specification.

ASSESSMENT CRITERION 4

4. The result of each experiment is applied to inform the methodology to be followed in subsequent experiments, where this is deemed appropriate in accordance with the designer`s instructions.

SPECIFIC OUTCOME 5

Conduct post-model-making activities.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The documented results of the various experiments carried out on the models are compared and the results recorded according to workplace specifications.

ASSESSMENT CRITERION 2

2. The resultant shapes and weights from the various experiments are evaluated to determine the optimum processing methodology to apply to the diamond gemstone.

ASSESSMENT CRITERION 3

3. The recommended methodology is recorded, together with notes on critical aspects of the methodology to be carried out, according to the workplace specific requirements and instructions are given for processing of the diamond gemstone.

ASSESSMENT CRITERION 4

4. Good housekeeping is exercised after model making diamond gemstones.

ASSESSMENT CRITERION RANGE

Good housekeeping must include:

Clean tools and equipment

Replace materials, tools and equipment into correct storage facilities

Documentation is filed in appropriate storage fro ease of retrieval if needed.

ASSESSMENT CRITERION 5

5. Diamond gemstones are accounted for after model making in accordance with the workplace security system.

UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS

1. Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.

2. Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.

3. Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures.

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE

Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Without knowledge of the listed embedded knowledge, candidates are unlikely to achieve all the specific outcomes to the standards described in the assessment criteria.

This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate`s performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard.

UNIT STANDARD DEVELOPMENTAL OUTCOME

N/A

UNIT STANDARD LINKAGES

N/A

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems and make decisions using critical and creative thinking.

Note: The ability of the candidate to identify the need for model making, to monitor the effects of fashioning the model and to determine the optimal processing methodology requires critical and creative thinking to solve problems.

UNIT STANDARD CCFO WORKING

Work effectively with others as members of a team, group, organisation or community.

Note: The interaction between designers and polishers through the process of model making indicates the ability to work effectively as a team member within the structure of the organisation.

UNIT STANDARD CCFO ORGANISING

Organise and manage themselves and their activities responsibly and effectively.

Note: The ability to make moulds, construct models and fashion models indicates the candidate`s ability to organise and manage activities in the work environment.

UNIT STANDARD CCFO COLLECTING

Collect, analyse, organise and critically evaluate information.

Note: The ability of the candidate to interpret the results of model making experiments indicates the ability to collect, organise and evaluate information.

UNIT STANDARD CCFO SCIENCE

Use science and technology effectively and critically showing responsibility towards the environment and health of others.

Note: The ability to understand the use of model making and its influence on the decision about the methodology to apply to process the diamond gemstone demonstrates the critical use of science and technology in the safeguarding of the material, the environment, fellow workers and oneself.

UNIT STANDARD ASSESSOR CRITERIA

Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:

Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.

Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.

Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.

The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.

The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.

All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent.

UNIT STANDARD NOTES

Terminology

Specified Requirements

Specified requirements include legal and site-specific requirements and are contained in one or more of the following documents:

Legal

The Bargaining Council for the Diamond Cutting Industry Main Agreement

Regulations of the Diamonds Act, as amended

The Occupational Health and Safety Act, No 85 of 1993

SABS and other relevant standards and quality assurance measures

A glossary of terms about the terminology of the industry issued by the Bargaining Council for the Diamond Cutting Industry

Site Specific

User manuals supplied by equipment manufacturers

Workplace diamond gemstone security system

The employer`s work specifications, tariff agreements and policies and procedures.

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

	ID	QUALIFICATION TITLE	PRE-2009 NQF LEVEL	NQF LEVEL	STATUS	END DATE	PRIMARY OR DELEGATED QA FUNCTIONARY
Elective	78966	National Certificate: Diamond Design and Evaluation	Level 5	Level TBA: Pre-2009 was L5	Passed the End Date - Status was "Reregistered"	2023-06-30	MQA

PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD:

This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.

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