18.82 CTS 'TIFFANY STONE' OPAL FLUORITE ROUGH 2 [VS6157]

Item Information

Dimensions (mm) 30 x 11 x 8mm
Weight (carats) 18.82 carats

TIFFANY STONE

This is  a natural untreated rough specimen of opal flourite from Utah Usa.This material comes from a beryllium mine and it is becoming  hard to mine in quantity.Tiffany Stone is composed of various  minerals such as bertrandite , beryl, calcite, chalcedony, cobalt, dolomite, fluorite, manganese oxide, rhodonite, quartz, zinc and  white opal potch. The purple color that characterizes Tiffany Stone was created by fluorine gases, while the stricking black-colored veins were caused by manganese oxide; all of which were sealed within the sedimentary layers, becoming opalized over time. Tiffany Stone does not display any opalescence or colour play that is common in Australian opal.This material will flourense a bright GREEN under short wave ultra violet light.It is best to use a mask when cutting this material.As far as i can find out the name is not registered but it seems to have been accepted in the trade as the "Tiffany stone'

Also known as ice cream opal

Stunning patterns.

Weight 18.82 cts app

Size 30 x 11 x 8 mm app

We have taken the picture with the stone wet-this gives you a idea of how it looks when its polished

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6 bids placed so far

$6 francemarty
$5 electra
$4 electra
$3 francemarty
$2 electra
$1 gruberfscott
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Pricing & Details

Bid Increment $1
Starting Bid $1
Auction ID 917539
Watchers 2 watching
Viewed 125 times
Starts 2nd Aug 2020 5:28pm PDT
Ends 23rd Aug 2020 5:28pm PDT

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