Chrome-Tremolite

A chromian variety of Tremolite.

A green facetable material has been found in the Lalatema area of Tanzania.
General Information
A variety or type of:Tremolite
Photos of natural/un-cut material from mindat.org
Physical Properties of Chrome-Tremolite
Mohs Hardness5 to 6
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity2.90 to 3.20
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityPerfect
Michael O’Donoghue, Gems, Sixth Edition (2006)
FractureUneven
Arthur Thomas, Gemstones (2009)
Optical Properties of Chrome-Tremolite
Refractive Index1.599 to 1.637
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Optical CharacterBiaxial/-
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Birefringence0.023 to 0.028
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Colour
Colour (General)Green
Gemdat.org, Management Team (2012)
TransparencyTransparent,Translucent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Chrome-Tremolite
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
HabitFibrous, granular or columnar aggregates
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Chrome-Tremolite information at mindat.org
Copyright © Jolyon & Katya Ralph 1993-2019. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.