Costantini Rediscovers Neglected Gem

If you've ever picked up a standard gemological text on the subject of opals, you probably learned that they were discovered in Czechoslovakia. That was the sum total of information available on Czech opal—until now. Dr. Luigi Costantini, geologist and gemologist with the International Gemological Institute Italy, has written The Slovak Opal: A Rediscovery of the “Queen of the Gems,” for Gem Lovers and Tourists. The story begins in Eastern Slovakia, which, until the end of the 19th century, was the world's sole source of opal. It describes the area, its commerce, mine localities, the people who dug for precious opal, the landscapes, and individual mining sites. Costantini is a mineralogist, so there's plenty of gemological information, as well. Other sections include the classification of Slovak opal; quality grading and cutting; and references in literature, myths, and legen
JCK PRO

This content is exclusive to JCK Pro subscribers. Subscribe now to access this and much more with discount code GOPRO21 for $199 for an entire year of access (reg. $249).

SUBSCRIBE TO CONTINUE

Already a JCK Pro? Log in

A JCK Pro subscription is your all-access pass to people and resources on the
cutting edge of the retail jewelry industry, from the industry authority you
know and trust

Learn about the Perks of JCK Pro

Log Out

Are you sure you want to log out?

CancelLog out