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August birthstone: Peridot, spinel, or sardonyx

Summary by EarthSky
A closeup of a peridot crystal, one of the 3 recognized August birthstones. Image via Rob Lavinsky/ Wikipedia (CC BY-SA 3.0). Were you born in August? If so, you have a choice of three birthstones: green, crystalline peridot; vibrant and colorful spinel; or striped sardonyx. August birthstone peridot Peridot is a gem-quality transparent variety of olivine, a mineral composed of magnesium-iron silicates. The color of olivine ranges from olive to …

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August birthstone: Peridot, spinel, or sardonyx

A closeup of a peridot crystal, one of the 3 recognized August birthstones. Image via Rob Lavinsky/ Wikipedia (CC BY-SA 3.0). Were you born in August? If so, you have a choice of three birthstones: green, crystalline peridot; vibrant and colorful spinel; or striped sardonyx. August birthstone peridot Peridot is a gem-quality transparent variety of olivine, a mineral composed of magnesium-iron silicates. The color of olivine ranges from olive to …

·United States
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EarthSky broke the news in United States on Friday, August 1, 2025.
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