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.
BG - Elevated sources of cobalt in the Arctic Ocean
0.35 ct. Canadian Cobalt Spinel - The Gem Trader Rare Gems — The Gem Trader
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Delicate Yellow Flower With Five Petals, Green Leaves In Blurred Background Stock Photo Alamy
BLUE SPLENDOR: watch the story of the BIGGEST COBALT BLUE SPINEL
Delicate Yellow Flower With Five Petals, Green Leaves In Blurred Background Stock Photo Alamy
GIL Certified 1.79 Carat Cobalt Blue Natural Spinel from Burma Untreated For Sale at 1stDibs
4 Crystals and Crystallization – Mineralogy
Spinel: Red and blue gems confused with ruby and sapphire
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Spinel - Encyclopedia
Global distribution of sediment-hosted metals controlled by craton
Magnetochemistry
Location of the Beluga and Bowhead calc-silicate pods, True North Gems