Many of these replicas were quite large, presenting quite a challenge in cutting and polishing. The Centennial cut is different in that it has no flat table, but has 16 facets at 10 degrees. The girdle, instead of being two percent the total depth of the stone, is 2 mm wide, with 85 degrees and 95 degrees alternating instead of the usual 90 degrees. With this table and girdle, a very brilliant gem was created. Indexing is for a 64 index gear.
Angles are for quartz.
Cut the crown first, the pavilion last. This article may not be copied, distributed or reprinted in any form without the Canadian Rockhound editor's permission. The author is now deceased. To contact the editor, please use the e-mail address provided. Authorized reprints must acknowledge the author, original source and the Canadian Rockhound, and include the website URL address of the Canadian Rockhound.