mineral
Citrine
SiO2 (Silicon Dioxide)
Hardness: 7 (Mohs scale), Color: Pale yellow to brownish orange, Luster: Vitreous, Crystal structure: Trigonal, Cleavage: Indistinct, Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Pale yellow to brownish orange, Luster: Vitreous, Crystal structure: Trigonal, Cleavage: Indistinct, Specific gravity: 2.65
Formation & geological history
Formed in igneous, metamorphic, and sedimentary rocks. Often created naturally by heat from magma bodies interacting with amethyst or smoky quartz.
Uses & applications
Primarily used in jewelry as a gemstone and highly valued by mineral collectors.
Geological facts
Natural citrine is relatively rare; most commercial citrine is actually heat-treated amethyst or smoky quartz. The name comes from the Latin word 'citrina' which means yellow.
Field identification & locations
Identified by its yellow to orange color, vitreous luster, and conchoidal fracture. Found in places like Brazil, Madagascar, and the USA.
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Nephrite Jade
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Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral