Abstract
We discuss several illumination effects in gemstones and present maps to evaluate them. The matrices and tilt views of these maps permit one to find the stones that perform best in terms of illumination properties. By using the concepts of the main cutter's line, and the anti-cutter's line, the problem of finding the best stones is reduced by one dimension in the cutter's space. For the first time it is clearly shown why the Tolkowsky cut, and other cuts adjacent to it along the main cutter's line, is one of the best round brilliant cuts. The maps we introduce are a valuable educational tool, provide a basis for gemstone grading, and are useful in the jewelry industry to assess gemstone performance.
Original language | English (US) |
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Article number | 093604 |
Journal | Optical Engineering |
Volume | 46 |
Issue number | 9 |
DOIs | |
State | Published - 2007 |
Keywords
- Diamond cuts
- Diamonds
- Gemstone brilliance
- Gemstone cuts
- Gemstone evaluation
- Gemstone fire
- Gemstone grading
- Gemstone scintillation
- Gemstones
- Round brilliant
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Engineering