Properties
| Category | Phyllosilicate minerals |
|---|---|
| Formula | KMg3(AlSi3O10)(F,OH)2 |
| Crystal system | Monoclinic |
| Color | Brown, brownish red, dark brown, yellow, yellowish brown, green, white and gray |
| Crystal habit | Tabular, scaly masses, rarely perfect phenocryst tablets |
| Cleavage | Perfect basal (001) |
| Fracture | None |
| Tenacity | Tough, flexible thin laminae |
| Mohs scale hardness | 2–2.5 |
| Luster | Pearly, sometimes slightly metallic on cleavage surfaces |
| Streak | White |
| Diaphaneity | Transparent to translucent |
| Specific gravity | 2.78–2.85 |
From the Wikipedia article
Phlogopite is a yellow, greenish, or reddish-brown member of the mica family of phyllosilicates. It is also known as magnesium mica.
Source
Source record: crystal-compendium/phlogopite/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Phlogopite — revision id 1378043561. Text and properties from Wikipedia, licensed CC BY-SA 4.0.