August Birthstones: Sardonyx, Peridot & Spinel Sardonyx - "The Original" Sardonyx was the original August birthstone before the other two gemstones joined the party. This gemstone combines alternating layers of sard and onyx; two types of the layered mineral chalcedony to create a reddish orange stone with white bands. Sardonyxes found in India are the…
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August Birthstones: Sardonyx, Peridot & Spinel
