Gem Cutting Demonstration

blue sapphire on a dopstickI have a friend who is a well-known gem cutter out of Denver…Denton Anderson of Denver Gem Cutting. I needed him to trim a gem quality Chatham #2 blue sapphire for one of my customers.

Barbara needed the stone to fit into a Naval Academy ring, so the pavilion needed to be trimmed a bit. Generally speaking, stones for class rings and other military and organizational rings need to be a bit more shallow than a standard cut. I knew Denton would do a great job.

On the left, you see the stone attached to a dopstick. Don’t be alarmed by what appears to be inclusions, that is actually the adhesive showing through the pavilion of the stone. Chatham stones are eye-clean with no inclusions visible to the naked eye.

It’s interesting to watch Denton cut stones and see the equipment he uses etc., so I decided to shoot a short video to share on my blog. Enjoy.

Author: Michelle M. Rahm is a GIA-trained Graduate Gemologist and is President of Colorado’s Mile High Chapter of the GIA Alumni Association. She has been selling gemstones and jewelry online since 1997. Visit her websites and

About mrahm

Michelle holds a Graduate Gemologist Diploma, Graduate Diamonds Diploma and Graduate Colored Stones Diploma through the Gemological Institute of America's distance education program. Michelle currently serves as President of the Mile High GIA Alumni Association. She also serves on the board of the Rocky Mountain Jeweler's Association and is a member of the American Gem Trade Association.
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