Scientists figure out origin of cobalt-blue spinel in Canada's Arctic

Small spinel stones with good transparency and fine cobalt-blue colour can sell for about 10 times the price of a comparable sapphire.

Metamorphosed carbonate platforms and controls on the genesis of sapphire, gem spinel, and lapis lazuli: Insight from the Lake Harbour Group, Nunavut, Canada and implications for gem exploration - ScienceDirect

Beluga calc-silicate rock under shortwave ultraviolet light showing the

Astrominerals - Wikiversity

Spinel Color and Magnetism, Blue Spinel and Cobalt Spinel

Delicate Yellow Flower With Five Petals, Green Leaves In Blurred Background Stock Photo Alamy

Spinel Color and Magnetism, Blue Spinel and Cobalt Spinel

0.35 ct. Canadian Cobalt Spinel - The Gem Trader Rare Gems — The Gem Trader

Origin of ultrahigh pressure and highly reduced minerals in podiform chromitites and associated mantle peridotites of the Luobusa ophiolite, Tibet - ScienceDirect

Spinel - Encyclopedia

Spinel: Red and blue gems confused with ruby and sapphire

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Spinel Auctions 9.1 x 7.4 x 6mm 3.4 cts Auction #2266079 Gem Rock Auctions

3.40 CRT SPINEL COBALT BLUE SPINEL RARE 100% NATURAL UNHEATED BURMESE

BLUE SPLENDOR: watch the story of the BIGGEST COBALT BLUE SPINEL

Cobalt Blue - Whistler Leather

Cobalt Blue

Re-Sharing our Ultramarine Blue, Cobalt Blue and Cerulean Blue color comparison. Each of these are excellent options for a “Primary Blue” on your

Cobalt Blue Dark

Oracal 651 - Cobalt Blue