mineral
Small yellow-brown mineral specimen, likely citrine or yellow quartz
Quartz (SiO₂), possibly iron-colored citrine; identification is uncertain from the image
AI-generated identification · may be incorrectAppears opaque to translucent and rounded, with a yellow-brown color. Quartz has Mohs hardness 7, vitreous luster, and a hexagonal crystal structure; the specimen’s cleavage and specific gravity cannot be determined visually.
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Physical properties
Appears opaque to translucent and rounded, with a yellow-brown color. Quartz has Mohs hardness 7, vitreous luster, and a hexagonal crystal structure; the specimen’s cleavage and specific gravity cannot be determined visually.
Formation & geological history
Quartz forms in igneous and hydrothermal settings and in veins or cavities in other rocks. Its age and exact formation environment cannot be established from the image.
Uses & applications
Quartz is used in jewelry, glassmaking, and electronics; this small piece may be kept as a collectible.
Geological facts
Natural citrine is relatively uncommon; much commercial ‘citrine’ is heat-treated amethyst.
Field identification & locations
The image shows a tiny rounded specimen on a light surface, without diagnostic crystal faces or a visible matrix. A hardness test, streak, and close inspection would help distinguish quartz from other yellow minerals.
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