mineral
Raw yellow quartz crystal, likely citrine
Quartz (SiO₂), iron-colored variety commonly sold as citrine
AI-generated identification · may be incorrectTranslucent honey-yellow, vitreous luster, irregular fracture, and likely hexagonal quartz structure; hardness Mohs 7, specific gravity about 2.65. The rough shape and lighting make precise identification uncertain; it could also be yellow chalcedony or iron-stained quartz.
Identified More mineral →
Explore Raw yellow quartz crystal, likely citrine in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Translucent honey-yellow, vitreous luster, irregular fracture, and likely hexagonal quartz structure; hardness Mohs 7, specific gravity about 2.65. The rough shape and lighting make precise identification uncertain; it could also be yellow chalcedony or iron-stained quartz.
Formation & geological history
Quartz forms in hydrothermal veins, cavities, and igneous pegmatites; yellow coloration commonly results from iron impurities or irradiation and heating. Citrine-bearing quartz is geologically widespread, with deposits ranging from ancient Precambrian rocks to younger volcanic systems.
Uses & applications
Used as a decorative and lapidary stone, in jewelry, and as a collector specimen; ordinary rough pieces have little industrial value compared with clear quartz.
Geological facts
Natural citrine is relatively uncommon; much commercial citrine is heat-treated amethyst or smoky quartz. Quartz commonly shows conchoidal fracture rather than cleavage.
Field identification & locations
Check for glassy luster, hardness sufficient to scratch ordinary glass, and absence of cleavage; a streak test should be white. Common sources include Brazil, Madagascar, Spain, Uruguay, and the United States.
