Properties
| Category | Tectosilicate minerals |
|---|---|
| Formula | Silica (silicon dioxide, SiO2) |
| Crystal system | Trigonal |
| Color | Natural: pale yellow, with orange, green, or smoky hues ; Heat-treated amethyst: yellow-orange, orange-red, orange-brown |
| Crystal habit | Hexagonal, massive ; Heat-treated amethyst only: druzy, geodes |
| Cleavage | None |
| Fracture | Conchoidal |
| Mohs scale hardness | 7 |
| Luster | Vitreous |
| Streak | White |
| Diaphaneity | Transparent to translucent |
| Specific gravity | 2.65 |
From the Wikipedia article
Citrine is a transparent, yellow variety of quartz. Its name is derived from the Latin word citrus, by way of the French citrin or citron (lemon). Citrine is one of the most popular yellow gemstones and has been used since ancient Egyptian times. There is disagreement as to which trace elements are responsible for its color. Not all yellow quartz is considered citrine, such as quartz stained by iron inclusions or coatings. Natural citrine is rare; most commercially available "citrine" is produced by heating amethyst or smoky quartz.
Source
Source record: crystal-compendium/citrine/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Citrine — revision id 1375063618. Text and properties from Wikipedia, licensed CC BY-SA 4.0.