Understanding Mineral Luster: Key Descriptors for Identifying Minerals

Jan 20, 2026

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This text explores the various terms used to describe the luster of minerals, which is a critical characteristic in mineralogy. The luster can range from metallic and submetallic to vitreous, adamantine, resinous, silky, pearly, greasy, pitchy, waxy, and dull. Specifically, talc is identified as having a pearly luster, while garnet exhibits a vitreous or glassy luster. Understanding these luster categories helps in the accurate classification and identification of minerals in scientific studies.

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Understanding Mineral Luster: Key Descriptors for Identifying Minerals

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Minerals Science Starter #2
Which word(s) best describe each mineral’s luster? • Metallic • Submetallic • Vitreous/Glassy • Adamantine/Diamond-like • Resinous • Silky • Pearly • Greasy/Oily • Pitchy • Waxy • Dull/Earthy
Which word(s) best describe each mineral’s luster? • Pearly – Talc • Vitreous/Glassy – Garnet