About Us
About Us
Drawing on over 45 years of experience in all phases of the gemstone business the Michelsen
Gemstone Index provides updated wholesale pricing on polished diamonds , as well over 20 variety
of  polished colored gemstones and pearls. It also provides 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 calculations. Additionally it covers colored gemstone evaluation criteria
as well as  colored stone weight estimation formulas.

Utilizing the years of experience of all aspects of  the rough diamond business including but not
limited to diamond cutting, teaching diamond cutting, diamond mining, rough diamond buying and rough
diamond sales. The Michelsen Diamond Index provides rough diamond pricing . By using the
Michelsen Rough Diamond Index, the buyer can estimate what he can afford to pay for rough
diamonds, in order successfully  to sell them to a cutter.
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 used as a guideline by appraisers, wholesalers,
distributors, educators and jewelers in more than thirty countries.

In 1988 Michelsen , drawing on his  experince in rough diamonds from mining to grading,
selling ,and cutting, began publishing the Michelsen Diamond  Index. The MDI is an annual
publication used as a guideline by rough diamond buyers, sellers and   educators

A list of testimonials is attached to this link, please click below to review
Known worldwide for his book, coauthored by Basil Watermeyer, “The Art of Diamond
Cutting", Michelsen is a former Senior Charter Member of the National Association of Gem
and Jewelry Appraisers, and a former Vice-President of the GIA Alumni Association,
Florida State Chapter, Founder/President of the GIA New Jersey Chapter as well as former
member of the Alumni Board.
Michelsen's experience includes purchasing rough gemstones in Africa, the Far East and
South America, owning a gem cutting factory producing 500 carats of cut and polished
gemstones daily, instructing at Gem Spectrum, a lapidary and gemology school in the
State of Florida, as well as owning, operating and instructing at The Diamond Institute in
New York State. Michelsen has also owned two retail jewelry stores and an appraisal
business. Michelsen's contribution to the Diamond Polisher
Occupational Standards for the Northwest Territories, Canada is recognized by the
Minister of Education, Culture and employment as a prerequisit for employment in
their industry.
Copyright© 2010 Michelsen Gemstone Index, Spokane, WA 99210 all rights reserved