Beautiful opals always a joy to buy from this seller.
Dimensions (mm) | 30 x 23.92 x 6.26mm |
Weight (carats) | 37 carats |
Colors |
Matrix opal from Andamooka, in South Australia, is a precious opal-included porous rock that is commonly color enhanced (carbon impregnated) to imitate the highly prized black opal from Lightning Ridge in northern New South Wales, Australia. This material has been commercially available since the mid-1950s and is often referred to as “sugar treated.” A basic sugar acid-carbonizing technique is used to carbonize, and thus darken, the cream-colored matrix of prepolished stones so that the play-of-color is more prominent. The carbon impregnator in treated Andamooka matrix opal can be readily identified with low-power magnification.
Origin: South Australia
Treatment: Sugar-Acid Treatment
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Beautiful opals always a joy to buy from this seller.
Stone arrived safely - rather nice it is too
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 AuditBid Increment | $1 |
Starting Bid | $148 |
Auction ID | 693630 |
Watchers | 1 watching |
Viewed | 63 times |
Starts | 27th Feb 2018 10:10am PST |
Ends | 4th Mar 2018 9:17am PST |
Provider | Shipping | Transit |
---|---|---|
DHL | $25.00 | 7 Days |
Registered Shipping | $8.00 | 21 Days |
Shipping Insurance all providers $0.00 (optional) |