6 years ago-
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I don’t usually cut material that valuable 🙂
For quartz angles, cutting the breaks to CP first loses about .024*width in pavilion height, or 0.24mm for a 10mm stone. This will vary somewhat if you change the angles. As Long & Steele suggests, you can stop a bit short of cutting to CP. If you cut a level girdle, it will work out. For a beginner, the meetpoint method is easier, and the material loss is small.Not really a question of material value, I cut my pavilion mains, then girdles, for max diameter. Leaving just enough material for the crown. LOL! Although I have to admit occasionally adjusting my crown angles when I didn’t leave enough!
Yesterday, I finished a 15mm citrine in 09.037 square semaphore cut. Did not need to fudge angles, but getting a table on there was a near thing!
BTW, this is great cut for light colored materials, very flashy with good dispersion. I did this same cut in a 10mm dark Four Peaks amethyst last week, and it was not nearly as impressive, guess I need to save my dark amethyst for smaller stones.
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