
gemstone
Faceted yellow-brown gemstone ring
Likely citrine (quartz, SiO₂); the image alone cannot confirm the stone or any treatments.
AI-generated identification · may be incorrectThe large faceted stone appears transparent yellow to brown with a vitreous luster; quartz has Mohs hardness 7 and a trigonal crystal structure. The surrounding setting appears to be metal with small accent stones.
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Physical properties
The large faceted stone appears transparent yellow to brown with a vitreous luster; quartz has Mohs hardness 7 and a trigonal crystal structure. The surrounding setting appears to be metal with small accent stones.
Formation & geological history
If citrine, it formed as quartz in silica-rich hydrothermal veins or pegmatites; commercial material is commonly heat-treated amethyst. Quartz deposits span many geological ages.
Uses & applications
Citrine is used in jewelry and collected as a colorful, relatively durable gemstone.
Geological facts
Yellow-brown appearance can also occur in other gems or glass, so visual identification is uncertain; gemological testing is needed to establish identity and treatment.
Field identification & locations
Check refractive index, inclusions, hardness, and spectroscopy with a gemologist; common citrine sources include Brazil, Madagascar, and Uruguay. The image does not show enough detail to verify the stone.
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