Pure Black Spinel from Bo Phloi, Kanchanaburi Province, Thailand We recently stumbled upon this hoard that was overstock from a product line for a major European jewelry house In all my decades of being in the gem game, I’ve not seen such a great deal on black spinel Black Spinel has incredible luster and durability . We're including a couple photos of gemstones we had faceted for Gem Dragon Auctions. They're quite popular Average size is around 1 gram / 5 carats. The first photo is an example of a 100 gram parcel 50 grams / 250 carats $50 100 grams / 500 carats $95 250 grams / 1250 carats $225 500 grams / 2500 carats $400 1000 grams / 5000 carats $700
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