Spinel

Spinel is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula MgAl₂O₄ in the cubic crystal system. Its name comes from the Latin word "spinella", which means spine in reference to its pointed crystals

"Spinel's are very durable and depending on its color 2 to 5 carat size it will often sell for $3,000 to $5,000 a carat"

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