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The spinel was recently put on auction in 2015 at a London auction house and sold for £962500 which equates to approximately 18M Australian dollars It set a new record for the most price per carat spinel ever sold at auction Explain in photo how its a pendant or brooch setup

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SPINEL BUYING GUIDE By Richard W Hughes Introduction Throughout history spinel has been confused with ruby In part this is because spinel is often found in the same deposits Gem spinel is a magnesium aluminum oxide while ruby corundum is an aluminum oxide

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The spinel was recently put on auction in 2015 at a London auction house and sold for £962500 which equates to approximately 18M Australian dollars It set a new record for the most price per carat spinel ever sold at auction Explain in photo how its a pendant or brooch setup

Spinel Buying Guide — Pala international

SPINEL BUYING GUIDE By Richard W Hughes Introduction Throughout history spinel has been confused with ruby In part this is because spinel is often found in the same deposits Gem spinel is a magnesium aluminum oxide while ruby corundum is an aluminum oxide

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Magnesia chrome brick belongs to alkaline refractory material Compared with magnesium chrome bricks it is featured with good thermal shock resistance volume stability under high temperature and high refractoriness under load

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20071017 Spinel is composed of magnesium aluminate and colored by chromium and iron It is quite hard 8 on the Mohs scale and it forms as cubic crystals like diamond Spinel occurs in octahedral crystals and has a complete absence of cleavage unlike diamond Due to spinels excellent dispersion spinel gemtones can

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