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Moijey Fine Jewelry & Diamonds Blog » Bloodstone
Brilliantly Layered Sardonyx
Originally published on August 25th, 2017 Updated on April 10th, 2020 August's third birthstone is a unique gemstone, but it is readily available. The third gem is called Sardonyx, a variety of chalcedony. Chalcedony is a cryptocrystalline quartz aggregate with an anamorphic crystal composition. Millions of tiny quartz crystals build the structure; the crystals are so small that a special microscope is needed to see each crystal. Sardonyx is a variety of cryptocrystalline quartz with alternating layers of either black or white bands with reddish-brown layers of sard. The picture above from the Smithsonian provides excellent examples of Sardonyx. What...
Bloodstone: A Surprise Birthstone for March
Originally posted on March 29th, 2017 Updated on April 17th, 2020 As a gemologist, I am excited to tell you that there is another birthstone for March. People born in March can enjoy both aquamarine, and an unusual gemstone called bloodstone. Bloodstone is a variety of chalcedony quartz, which is composed of millions of small quartz crystals. The crystals are so tiny that a special microscope is needed just to see the crystal structure. What makes bloodstone unique are the bright red patches all over the dark green surface. The red spots get their color from iron oxide. Bloodstone...