|The Michelsen Gemstone Index
The Diamond Institute, Inc.
Drawing on over 45 years of experience in the all phases of the gemstone business
the Michelsen Gemstone Index provides updated wholesale pricing on diamonds ,
over 20 variety of colored gemstones and pearls. It also gives you information on
diamond color and clarity grading standards, pricing of fancy colored diamonds,
how to estimate a diamonds weight and wholesale to retail markup calculation.
Additionally it covers colored gemstone evaluation criteria as well as colored
stone weight estimation formulas.
Sofus S. Michelsen, a Graduate Gemologist, Certified Master Gemcutter, and
instructor in gem identification, grading and evaluation, developed a defensible
pricing structure for gemstones. He began publishing The Michelsen Gemstone
Index in 1983. The Michelsen Gemstone Index a quarterly publication is currently
accepted in more than 30 countries. The index is used as a guideline by
appraisers, wholesalers, distributors, educators and jewelers in more than thirty
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