A GRADE SPARKLING LEOPARD OPAL FROM MEXICO 28.CTS [VS1877 ]

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Dimensions (mm) not provided
Weight (carats) not provided
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 LEOPARD OPAL

This is  a  sparkling natural untreated  polished opal from Mexico.Also known as  opal from the lost mines of the Aztecs.There are some small cavities you can see in the photo but when worn you dont notice them.This stone has a dancing display of BLUE GREEN RED  sparkling fire which is very attractive.

weight 28.10 cts app

Size 29 x 14 x 8 mm app

The GIA have published this about this type of opal- "Leopard opal" consists of vesicular basalt impregnated with play-of-color opal, and is known only from Zimapán, Hidalgo State, Mexico. The formation of this ornamental stone was made possible by an abundance of silica derived from the chemical breakdown of overlying volcanic ash layers, the permeability of the underlying basalt, and the presence of pores in the basalt of an aesthetically pleasing size. The even distribution and small size of the opal-filled vesicles makes the rock attractive when cut or carved and polished. Veinlets and irregular masses of play-of-color opal showing various bodycolors (red, white, and colorless to pale blue) have also been deposited along joints and fractures within the basalt flow. This opal deposit, which may have been worked in pre-Columbian times, has been explored only by a number of small test pits in recent years, and significant potential remains for its future development.

2d 8h 12m 18s

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Pricing & Details

Bid Increment $1.00
Starting Bid $144.00
Auction ID 194429
Watchers 4 watching
Viewed 919 times
Starts 5th Dec 2016 8:03pm PST
Ends 8th Dec 2016 8:00pm PST

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