Margarite
| Margarite | ||
|---|---|---|
Mohs scale hardness 4 | | |
| References | [2][3][4] | |
Margarite is a calcium rich member of the
Mohs hardness of 4. It is translucent with perfect 010 cleavage and exhibits crystal twinning
.
It occurs commonly as an alteration product of corundum, andalusite and other aluminous minerals. It has been reported as forming alteration pseudomorphs of chiastolite along with muscovite and paragonite. The margarite in this occurrence forms preferentially along the dark graphite rich inclusions with the chiastolite crystals.
Margarite is found in the emery deposits of
Aegean islands
, and with corundum
at several localities in the United States.[5]
References
Wikimedia Commons has media related to Margarite.
- Deer, W.A., R.A. Howie, and J. Zussman (1963) Rock-forming minerals, v. 3, Sheet Silicates, p. 95-98.
- This article incorporates text from a publication now in the public domain: Spencer, Leonard James (1911). "Clintonite". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 6 (11th ed.). Cambridge University Press. p. 530.
- Mineral Data Publishing PDF
 | This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it. |