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#6840
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390,00 €
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Apophyllite 13.08 ct.
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Apophyllite
A popular mineral among collectors who has been recently re-considered : check
http://www.mindat.org/min-283.html
Is a Hydrated Potassium Calcium Sodium Silicate Fluoride Hydroxide with formula
(K,Na)Ca4Si8O20(F,OH) - 8H2O .
Although is quite common in natural crystal, is very difficult to cut and polish, due to his easy cleavage: a challenge for the cutters.
The hardness is 4.5-5 and this gem here comes from a classic locality: Poona,India.
A very small flaw is visible at naked eye
Size: 14.9x14.5x11.3 mm
Weight: 13.08 ct.
CODE#6840
Origin | India |