Opal - The Ross Jewelry Company

Australian Black Opal

Lightning Ridge Opal Gemstones

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Dark base Australian Black Opal from Lightning Ridge, Australia Light base Australian Black Opal from Lightning Ridge, Australia
Australian Black Opal at The Ross Jewelry Company in Atlanta, Georgia.

Australian Black Opals and Lightning Ridge Opal | In general, Opal is a beautiful, but paradoxical gemstone . . . and one of the most fascinating.  The Ross Jewelry Company in Atlanta is one of the best resources in the United States for fine Black Australian Opals from the Lightning Ridge area of Australia.

Australian Black Opals in Atlanta | In many cases, Tom Ross, buys the company's Lightning Ridge opals directly from the miner who found the stone.  Lightning Ridge opals are nearly electric is appearance and can be remarkably beautiful and even . . . breathtaking.  If you are looking for your own Lightning Ridge Black Opal, please don't hesitate to call or send us an email.  Tom will be pleased to help you select one of these incredible gemstones.

Atlanta Australian Black Opal Dealer |  If you're looking for a beautiful Loose Australian Black Opal in Atlanta . . . you've found a source like no other.  We often buy our colored gemstones directly from those who mine them. In one case, we took a rough brownish green tanzanite that was brought to us from a mine in Tanzania and cut it into a sparkling oval gem.  Then, through a near miraculous process, we unlocked its magnificent purplish-blue brilliance.  It is unlikely that you will encounter another dealer with more experience or resources in the world of colored gemstones than The Ross Jewelry Company in Buckhead. And . . . that is where the magnificent 18K white gold Australian black opal and diamond ring below was designed and created.

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Opal is a form of quartz . . . then, it is not a form of quartz. Quartz is very common, yet has many rare and precious gem varieties. Opal itself has numerous varieties. It is the most colorful gemstone, but some forms are colorless. It can be very bright and beautiful, and it can be dull and dead. It is best known for its blazing flashes of color, but some varieties have no flashes of color at all . . . and are still opals. It can be black, and it can be white. Its best known attribute, the brilliant flashes of multiple colors, are not called opalescence, but irridescence. Some people think opal is unlucky, but it is one of the most valuable and desirable of all gems.

Forms of Quartz
Opal is a variety of quartz. Quartz in turn is silicone dioxide, one of the commonest minerals on earth. Quartz exists in a number of different forms, ordinary sand is one form, but there are numerous gemstone forms of quartz.

Opal as a Gel
Actually because opal is a gel, it is, strictly speaking, not a form of quartz. Quartz is a crystalline form of silicon dioxide, opal is a solid gel. However because the chemical formula is the same except that opal is hydrous, that is it contains some water which is chemically attached to the silicon dioxide molecules.

Ancient Sources
Opals were known and mined in Roman times. The Roman mines were in and around Cervenica, previously in Czechoslovakia, although we have now lost track of all the recent changes in Balkan geography.

Opal is one of the softest gemstones and should be enjoyed, but owned with reasonable care.

Technical Characteristics

Chemical Composition: SiO2nH2O - Hydrous Silicon Dioxide
Hardness: 5.5 to 6.5
Specific Gravity: 1.95 - 2.20
Refractive Index (R.I.): 1.44 - 1.47
Optical Character: Isotropic
Crystal Structure: Gel

Austrailian Black Opal - The Ross Jewelry Company
The Ross Jewelry Company - 3490 Piedmont Road NE (One Securities Centre), Suite 120 - Atlanta, Georgia 30305 - (404) 495-3720
We are proud to hold diplomas from or associations with some of the jewelry industry's most respected organizations.

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