Faceting Made Easy, Part 5: Gemstone Transferring and Crown Cutting

Note: This is a six-part edited version of Trevor Hannam’s Faceting Made Easy, a general introduction to faceting and a guide for learning to cut a standard brilliant gem. Part 5 includes Chapters 11 and 12. These chapters cover gemstone transferring techniques and crown cutting. The International Gem Society thanks Mr. Hannam for permission to post his work.

Gemstone Transferring Techniques

You must have a transfer jig, like the typical one illustrated below. (Most faceting machines include one). You’ll need it for transferring your gemstone from one dop to another. After cutting the pavilion, you’ll need to move the gem to another dop, this time with the crown facing up. A transfer jig is a very efficient and accurate way to do this without losing facet alignment.

transfer jig - gemstone transferring

Check Your Transfer Block and Dop Sticks

Make sure to check your transfer block’s alignment. Put a couple of dops of the same size in the holders, then bring them together. Run a fingernail across where they join. If your nail digs in at the junction at one point but not at another, have an engineer examine the transfer block’s alignment. (First, check your dop sticks for bending, which could also …

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Full Article Details

Content Length 3760 words
Reading time 18 min 48 sec

Here's what you get if you unlock this article:

  • Gemstone Transferring Techniques
    • Check Your Transfer Block and Dop Sticks
    • Cleaning and Preparing Dops for Gemstone Transferring
    • Transferring the Dop Sticks
      • Gemstone Transferring with Super Glue
      • Gemstone Transferring with Epoxy
    • Separating the Dop Stick from the Gemstone
  • Cutting the Crown Facets
    • The Girdle Facet
    • Cutting the Crown Mains
      • Pre-Polishing the Crown Mains
    • Cutting the Crown Girdles
    • Cutting the Star Facets
      • Pre-Polishing the Star Facets
  • Polishing the Crown Facets
    • Polishing the Star Facets
      • Adjusting the Polishing Contact Area
    • Polishing the Crown Girdle Facets
    • Polishing the Crown Main Facets
    • Cleanup Procedures
  • The Table Facet
    • Setting up the 45° Angle Dop
      • Adjusting the 45° Angle Dop
    • Cutting the Table Facet
    • Polishing the Table
      • Hand Polishing/Lapping
  • Your First Cut Stone

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