Properties
| Category | Tectosilicate minerals |
|---|---|
| Formula | CaAl2Si3O10·3H2O |
| Crystal system | Monoclinic |
| Color | Colorless white, pink, salmon, red or green |
| Crystal habit | Thin prismatic needles, radiating groups and fibrous masses |
| Cleavage | Perfect on {110} and {110} |
| Fracture | Irregular/uneven |
| Tenacity | Brittle |
| Mohs scale hardness | 5 to 5+1⁄2 |
| Luster | Vitreous, silky when fibrous |
| Streak | White |
| Diaphaneity | Transparent to translucent |
| Specific gravity | 2.16 to 2.40 |
From the Wikipedia article
Scolecite is a tectosilicate mineral belonging to the zeolite group; it is a hydrated calcium silicate, CaAl2Si3O10·3H2O. Only minor amounts of sodium and traces of potassium substitute for calcium. There is an absence of barium, strontium, iron and magnesium. Scolecite is isostructural (having the same structure) with the sodium-calcium zeolite mesolite and the sodium zeolite natrolite, but it does not form a continuous chemical series with either of them. It was described in 1813, and named from the Greek word, σκώληξ (sko-lecks) = "worm" because of its reaction to the blowpipe flame.
Source
Source record: crystal-compendium/scolecite/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Scolecite — revision id 1331288776. Text and properties from Wikipedia, licensed CC BY-SA 4.0.