Item Information

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



header main


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   sparkling fire which is very attractive.

weight 31.00 cts app

Size 30 x 26  x 4  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.


0 bids placed so far
Add to Watch List Ask a Question * All prices in USD

Audit Information

The Opal Sheriff program allows our members to request an audit on any auction, which is completed by an independent gemologist who assesses the accuracy of the item description and pictures.

Request Audit

Pricing & Details

Bid Increment $1.00
Starting Bid $92.00
Auction ID 319927
Watchers 2 watching
Viewed 703 times
Starts 21st Oct 2016 12:03am PDT
Ends 22nd Oct 2016 12:00am PDT

Shipping & Insurance

Provider Shipping Transit
FedEx $25.00 5 Days
Standard Shipping $4.00 21 Days
Shipping Insurance all providers $7.00 (optional)

About Volcanicopals

Hello! Opal Auctions is an international marketplace offering Opal Stones, Rough & Jewelry from professional Opal cutters, dealers & miners. Register for $10 off your first purchase.