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.

Spinel Color and Magnetism, Blue Spinel and Cobalt Spinel

List of Blue Gemstones – Names, Meanings, & Interesting Facts

Publications, Department of Physics

Why Benitoite is a rare gemstone, Kauthar 💎 posted on the topic

Ancient lost continent has been discovered in Northern Canada - The Weather Network

Nuummite Gemstone: Properties, Meanings, Value & More

WTX Speed Feed, 40% OFF

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

Diamond - Wikipedia

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

Beads Guru: Gemstone Names and What They Mean: The Name of The Stone