Hexagonite

Big Photo

Fowler, St. Lawrence Co., New York, USA
2.07 carats
© Rarestone.com

Hexagonite is a transparent pink, pale lilac to purplish colour variety of Tremolite.

Hexagonite may show pleochroic colours: bluish-red to deep reddish violet.

The material has been faceted.

Hexagonite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
General Information
A variety or type of:Tremolite
Chemical Formula
Ca
 
2
Mg
 
5
Si
 
8
O
 
22
(OH)
 
2
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Photos of natural/un-cut material from mindat.org
Physical Properties of Hexagonite
Mohs Hardness5 to 6
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity2.98 to 3.03
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityPerfect
Michael O’Donoghue, Gems, Sixth Edition (2006)
Optical Properties of Hexagonite
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)Lilac-pink
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Causes of ColourPink, Mn3+
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent,Translucent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
LustreVitreous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (General)Common orangy, pinkish, reddish (also dull gray-green)
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Crystallography of Hexagonite
Crystal SystemMonoclinic
Gemdat.org, Management Team (2012)
Further Information
Mineral information:Hexagonite information at mindat.org
Significant Gem Localities
USA
 
  • New York
    • St. Lawrence Co.
Copyright © Jolyon & Katya Ralph 1993-2018. 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.