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Wollastonite in Devitrified Glass Imitating Horsetail Inclusions in Demantoid Garnet | Gems & Gemology
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Dr. Jason Loxton on X: "Second: Look at these strange small circles. They are called spherulites. They grow slowly in volcanic glass. Even though it's solid, glass will actually crystallize after it
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17. Devitrification Dan Barker, March Under surface conditions, glass is a metastable liquid with a tendency to crystallize. Devitrification is. - ppt download
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