August Birthstones | How to buy Sardonyx Gemstones & Jewelry

AUGUST BIRTHSTONES

Sardonyx

How to Buy Sardonyx



Sardonyx makes a great gift for people born in August who want something a little different than the traditional peridot or spinel birthstone. Readily available and relatively inexpensive, sardonyx makes an affordable addition to anyone’s collection.

The qualify factors of sardonyx are not as clearly defined as other gemstones like diamonds, but generally the 4Cs still apply. Ask an American Gem Society jeweler for help selecting the best gemstones.

The most attractive sardonyx shows a high contrast between reddish layers of sard stone and white bands of onyx. It may be translucent or opaque, seldom showing flaws or fractures.

Sardonyx is widely available and moderately priced in sizes up to 10 carats. The most common cut is cabochon, though it is popularly carved into cameos, intaglios, inlays, and brooches to emphasize the contrast between layers.

Artificial and imitation sardonyx has been produced from common chalcedony and plain agate as far back as Roman times, according to writings from first-century naturalist, Pliny. Some gems are also stained with iron oxide pigment or treated with nitric acid to enhance color.

These enhancements make stones less valuable than natural sardonyx, so watch for imitations when buying these gemstones. A certified American Gem Society Jeweler can help you select a genuine sardonyx stone.

Find a jeweler near you if you are looking for sardonyx gemstone jewelry.


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The American Gem Society (AGS) is a nonprofit trade association of fine jewelry professionals dedicated to setting, maintaining and promoting the highest standards of ethical conduct and professional behavior through education, accreditation, recertification of its membership, gemological standards, and gemological research.

The Society is committed to providing educational products to inform and protect the consumer and to contributing to the betterment of the trade by creating industry standards to protect the jewelry-buying public and the fine jewelry industry as a whole.

AGS Laboratories, founded to support the AGS mission, is a nonprofit diamond grading laboratory with a mission of consumer protection. Adhering to the AGS Diamond Grading Standards, AGS Laboratories is dedicated to offering diamond grading reports that provide consistency and accuracy based on science.

American Gem Society

8881 W. Sahara Ave. Las Vegas, NV 89117

info@ags.org (866) 805-6500