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The Real Gemmology of Ethiopian Opals in ‘Uncut Gems’

This article takes a look at the rough opal that plays a major role in the Adam Sandler film “Uncut Gems”. What is the real gemmology of opals?

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A round, bright red gem displayed on a dark gray background.
Article
The Red Hot Gems of Summer

These red, pink and orange hued gems evoke passion and excitement – and are sure-fire accessories for sultry summer days.

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Ethiopian precious opal showing chatoyancy.
Flashes and Flames in Ethiopian Opal

Chatoyancy, rarely seen in play-of-colour opal, is observed in Ethiopian material.

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Handful of opal
Article
Lightning Ridge: The World Capital of Fine Black Opal

Lightning Ridge is the world capital of fine black opals, the most desired of all opals. In June 2015 a group of GIA field gemmologists visited this legendary town in New South Wales, Australia. Come with us to explore this important source of fine opals.

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Opal beads with blue play-of-color.
Australian Opal Beads with Blue Play-of-Colour

Boulder opal in sandstone matrix is seen as beads in Tucson.

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Summer 2016 Gems & Gemology Cover
Article
Summer 2016 G&G: Diamonds from Diavik, Responsible Sourcing and Fabergé Cossack Figures

A summary of the content found in the Summer 2016 issue of Gems & Gemology.

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Article
Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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Exotic Gems, Volume 3 Book Cover
Books: Exotic Gems, Volume 3

Review of Exotic Gems, Vol. 3: How to Identify, Evaluate, Select and Care for Matrix Opal, Fire Agate, Blue Chalcedony, Rubellite Indicolite, Paraíba and Other Tourmalines, by Renee Newman.

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Opal with six-rayed star
Star Opal

An opal featuring a rare six-rayed star is examined in GIA's Bangkok lab.

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Opal with six-rayed star
Article
Star Opal

An opal featuring a rare six-rayed star is examined in GIA's Bangkok lab.

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