Unit of competency Outline

Date retreived
23/07/2026 5:50 AM AWST

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Complete pre-cutting processes for gemstone assemblies

Complete pre-cutting processes for gemstone assemblies

Unit of competency
National Code
MEM19059
State Code
OEU86
TGA Status
Current
DTWD Status
Approved
Current Release Number
1.00
Current Release Date
19/12/2022
View on TGA
State Implementation and Classification
Approved Date
19/04/2023
Field of Education
100307 - Jewellery Making
Original Release Date
19/04/2023
Nominal Hours
27
Description
This unit of competency defines the skills and knowledge required to select and prepare gemstones and backing materials for cutting as assemblies. It is based on deleted unit CUVOPA205A Complete pre-cutting processes for opal doublets and triplets.This unit applies to individuals processing gemstones in a small or large-scale production context. They use and adapt technical knowledge and skills to produce work. No licensing, legislative or certification requirements apply to this unit at the time of publication.Band: AUnit Weight: 3
Notes
Elements and Performance Criteria
1. Determine job requirements
  • 1.1 Follow standard operating procedures (SOPs)
  • 1.2 Comply with work health and safety (WHS) requirements at all times
  • 1.3 Identify job requirements from specifications
2. Prepare to cut assembly gemstones
  • 2.1 Select materials suitable for cutting as a gemstone assembly based on market requirements and characteristics of the stone
  • 2.2 Determine best colour and mark that side
  • 2.3 Check for flaws with a powerful light source and correct if necessary
3. Flatten gemstone and base
  • 3.1 Flatten gemstone on marked side until surface is suitable grinding or sawing equipment
  • 3.2 Select backing materials and flatten in accordance with job requirements
  • 3.3 Lap gemstone and base until flat satin finish is achieved
  • 3.4 Clean and dry gemstone and base sufficient for further processing
4. Adhere components together
  • 4.1 Choose adhesive and mix in line with manufacturers’ instructions
  • 4.2 Ensure stone is cemented with the best colour face down
  • 4.3 Adhere flattened surfaces together eliminating excess adhesive and air bubbles
  • 4.4 Allow adhesive to harden following manufacturers’ instructions
5. Pre-form gemstones
  • 5.1 Grind stone to expose join between gemstone and backing
  • 5.2 Grind stone to expose best colour
  • 5.3 Grind to rough shape to meet job requirements
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