72 Flash
Article Abstract:
Detailed instructions for gemstone faceting is presented. Effecting a nine-fold symmetry to a round stone can be done by using a 72-tooth gear index, with each successive faceting perpendicular to the chevron-shaped facets rendered in the pavillion design.
Publication Name: Lapidary Journal
Subject: Hobbies and crafts
ISSN: 0023-8457
Year: 1998
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Design and facet
Article Abstract:
The tangent ratio method is an effective tool in designing marquise cuts on gemstones. Designing the cut requires two drawing triangles, a millimeter-calibrated scale, a compass and a sheet of paper. The step by step design method is discussed.
Publication Name: Lapidary Journal
Subject: Hobbies and crafts
ISSN: 0023-8457
Year: 1992
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Design and facet
Article Abstract:
Step by step instructions for cutting a 10-main marquise with a 2:1 ratio is provided. The procedure involved was the "design and facet" using a 96-tooth index gear.
Publication Name: Lapidary Journal
Subject: Hobbies and crafts
ISSN: 0023-8457
Year: 1992
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