Huynh - Beginner Trillion
Beginner Trillion - Michiko Huynh
This design is good with most gem materials. It is easy and a good practice for the CAM pre-form. The pre-form serves as the pavilion. The pavilion facets 1 and 2 form a cone. The pavilion facets 3 and 4 are the girdle. The splitters (pavilion facets 5) are optional. The test-cut stone below is without the splitters.
The Cone Angle Method (CAM) is a way to cut a girdle outline following a cone with the prescribed angles. The girdle outline could be any shape; round, trillion, square rectangle, pear or even irregular shape. When you cut the cone, the most important thing is you make every cone facet evenly come together to the center point. After you cut the cone, you chain-cut the girdle at 90 degrees meaning linking one girdle facet to the next.
Click on this link to download the gemcad file: File:Beginner Trillion.gem
Click on this link to download the pdf file: File:BE4030~1.pdf