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ANDAMOOKA OPAL from AUSTRALIA- NATURAL -PENDANT— GOLD FROM COLLECTOR
- SKU
- Dimensions (mm)
- 59.140 x 34.750 x 7.510mm
- Weight (cts)
- 71.500
- Type
- Cabochon
- Colours
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THIS OPAL IS FROM PERSONAL COLLECTION AND IN 1980s
THIS NATURAL ANDAMOOKA OPAL HAS HIGH CABOCHON AND IS TREATED.
INCREDIBLE COLORS GAME! STUNNING BEAUTIFUL AND RARE. FOR THIS PENDANT I ALSO HAVE EARRINGS (CIRCA 70CT) also in GOLD AND TWO OTHER PENDANTS. ALL TOGETHER ALMOST 200CT OF THE SAME QUALITY. THE NEXT AUCTIONS WILL FOLLOW IN A MONTH. ALL PARTS ARE CUT FROM OVER 200CT OPAL IN THE EARLY 80'S. (please see pictures) HAVE FUN WITH BIDDING. CONGRATULATIONS FOR THE WINNER.
Andamooka Opal Treatment
The Andamooka opal mines are well-known for producing light opal, which compromises white, crystal opal, it is sometimes referred as “milk” opal.
Matrix Opal is a permeable opal, which originates from Andamooka, South Australia. A variety of boulder opal also appears in Andamooka. Most of the rock in the surrounding area is quartzite and so sometime the Opal forms in between this very ha rd rock. These are referred as the “painted ladies”.
Andamooka matrix opal is regularly treated to improve the colour by creating a black body using black carbon. This treatment involves a chemical treatment that is applied to the entire stone. When it comes out of the earth, it can look quite pasty, but by treating it by means of a carbon dye method it ultimately looks like a more appealing Opal.
Once it is totally treated, it is known as Andamooka treated matrix opal. With a rich solution of sugar with water, it is usually followed by a phase of simmering in a bath with a resolute sulphuric acid. The sugars pierce in the limestone matrix, and then the acid cooks it and that turns the white sugar around the pockets of opal into a black carbon. The outcome is that the darkened matrix encloses the pockets of opal, which does not diffract light. Some miners took the originals and sold them overseas as Lightning Ridge Black opal. After the scam was revealed, there developed a time when no one would purchase treated matrix. But the remarkable colours and rich black matrix of the best gemstones actually does present the attributes that make the Lightning Ridge black opal famous. Treatment of these matrix stones involves a moderately simple method of processing the stones.
- SKU
- Dimensions (mm)
- 59.140 x 34.750 x 7.510 mm
- Weight (cts)
- 71.500
- Type
- Cabochon
- Colours
-
THIS OPAL IS FROM PERSONAL COLLECTION AND IN 1980s
THIS NATURAL ANDAMOOKA OPAL HAS HIGH CABOCHON AND IS TREATED.
INCREDIBLE COLORS GAME! STUNNING BEAUTIFUL AND RARE. FOR THIS PENDANT I ALSO HAVE EARRINGS (CIRCA 70CT) also in GOLD AND TWO OTHER PENDANTS. ALL TOGETHER ALMOST 200CT OF THE SAME QUALITY. THE NEXT AUCTIONS WILL FOLLOW IN A MONTH. ALL PARTS ARE CUT FROM OVER 200CT OPAL IN THE EARLY 80'S. (please see pictures) HAVE FUN WITH BIDDING. CONGRATULATIONS FOR THE WINNER.
Andamooka Opal Treatment
The Andamooka opal mines are well-known for producing light opal, which compromises white, crystal opal, it is sometimes referred as “milk” opal.
Matrix Opal is a permeable opal, which originates from Andamooka, South Australia. A variety of boulder opal also appears in Andamooka. Most of the rock in the surrounding area is quartzite and so sometime the Opal forms in between this very ha rd rock. These are referred as the “painted ladies”.
Andamooka matrix opal is regularly treated to improve the colour by creating a black body using black carbon. This treatment involves a chemical treatment that is applied to the entire stone. When it comes out of the earth, it can look quite pasty, but by treating it by means of a carbon dye method it ultimately looks like a more appealing Opal.
Once it is totally treated, it is known as Andamooka treated matrix opal. With a rich solution of sugar with water, it is usually followed by a phase of simmering in a bath with a resolute sulphuric acid. The sugars pierce in the limestone matrix, and then the acid cooks it and that turns the white sugar around the pockets of opal into a black carbon. The outcome is that the darkened matrix encloses the pockets of opal, which does not diffract light. Some miners took the originals and sold them overseas as Lightning Ridge Black opal. After the scam was revealed, there developed a time when no one would purchase treated matrix. But the remarkable colours and rich black matrix of the best gemstones actually does present the attributes that make the Lightning Ridge black opal famous. Treatment of these matrix stones involves a moderately simple method of processing the stones.
Shipping provider | Shipping to Germany | Shipping to rest of world |
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Standard Shipping - Tracked | $10.00 / 7 days | $20.00 / 21 days |
DHL | $20.00 / 7 days | $20.00 / 21 days |
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Positive
beautiful opal!
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Positive
TOP SELLER! WE ARE VERY HAPPY WITH OUR PURCHASE! AMAZING OPAL! EVEN MORE BEAUTIFUL THAN PIKS! HIGHLY RECOMEND WILL DO BUSINESS AGAIN!
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Positive
Paid and shipped - no feedback left after 100 days