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Gemstone Details

Black Opal 9.80 ct, Oval Cabochon

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This 9.80 ct Black Opal features dazzling flashes of neon green that spill from a deep cobalt blue, reminiscent of the aurora borealis. 

AGTA Treatment: None

SKU: opal-404987-black

Gemstone Details

The AGTA defines 'enhancement' as any traditional process other than cutting and polishing that improves the appearance (color/clarity/phenomena), durability or availability of a gemstone.

Below is a helpful key describing what each treatment code means.

N Natural, or No Enhancement
H Heating
HP Heating and Pressure, or HPHT
O Oiling
R Radiation
U Diffusion

For a full list of treatment codes and more information, visit our treatments page.

Metals & Diamonds

Caring for your jewelery is easy! Most jewelry can be cleaned with warm water and a mild dish detergent, such as Dawn. This method is safe for diamonds, gold, platinum, and silver.


Extra care must be used when cleaning other types of gemstones. Find out how to care for your gemstone on our jewelry care page.

Protect your gemstone with GemShield®.

GemShield offers extensive protection against loss, theft, and damage. Have your jewelry repaired or replaced entirely with jewelry of the exact same quality. Learn more...

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return in exchange for a full refund. The item must be unworn or unused, and you’ll need the receipt or proof of purchase. Learn More

Custom-designed merchandise, watches, engraved items, family jewelry, and special order gemstones are not returnable.