Top Grade 23.15 ct Natural BIColor Tourmaline

Item Information

Dimensions (mm) 22.55 x 6 x 5mm
Weight (carats) 23.15 carats
No Treatment

A brilliantly transparent gem, sphene has fire greater than that of diamond! This gem is named from the Greek word for “wedge,” as its crystals are typically wedge shaped, but may be referred to by its mineral name, titanite. Another characteristic sphene possesses is birefringence, or double refraction, meaning that light splits into two rays as it passes through the gem. As a result, the back facets appear as double images, giving the gem a soft, hazy appearance, similar to the doubling seen in zircon.

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Pricing & Details

Bid Increment $1
Starting Bid $1
Auction ID 1311471
Watchers 1 watching
Viewed 31 times
Starts 20th Oct 2020 11:50am PDT
Ends 26th Oct 2020 11:48am PDT

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