Properties
| Category | Nesosilicate |
|---|---|
| Formula | CaBSiO4(OH) |
| Crystal system | Monoclinic |
| Color | Colorless or white; may be grayish, yellow, green, pale green, red, pink, etc. |
| Crystal habit | Crystal prismatic, short to tabular; Botryoidal or globular with columnar structure; granular to compact; cryptocrystalline |
| Cleavage | None |
| Fracture | Conchoidal to uneven |
| Tenacity | Brittle |
| Mohs scale hardness | 5 to 5.5 |
| Luster | Vitreous, rarely subresinous on fracture surface |
| Diaphaneity | Transparent to translucent, rarely opaque |
| Specific gravity | 2.96 – 3.00 |
From the Wikipedia article
Datolite is a calcium boron hydroxide nesosilicate, CaBSiO4(OH). It was first observed by Jens Esmark in 1806, and named by him from δατεῖσθαι, "to divide," and λίθος, "stone," in allusion to the granular structure of the massive mineral.
Source
Source record: crystal-compendium/datolite/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Datolite — revision id 1368538809. Text and properties from Wikipedia, licensed CC BY-SA 4.0.