Eosphorite

Big Photo

Brazil
1.45 carats
© Rarestone.com

Eosphorite is named from Greek "eosphoros" - dawn breaking, referring to the pink colour of the first specimens studied, which were found at Branchville, Fairfield County, Connecticut, USA.

Eosphorite forms yellowish brown, pink and sometimes colourless crystals. The crystals are monoclinic, but often show pseudo–orthorhombic forms due to twinning.

Attractive transparent pinkish orange crystals have been faceted.

Eosphorite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 

Eosphorite Gemstones by Size

This table shows distribution of Eosphorite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:1.45 cts
Heaviest:1.83 cts
Average:1.65 cts
Total photos:4
Do you have a larger Eosphorite? Why not upload a photo?
1.45ct to 1.49ct1.49ct to 1.53ct1.53ct to 1.56ct1.56ct to 1.60ct1.60ct to 1.64ct1.64ct to 1.68ct1.68ct to 1.72ct1.72ct to 1.75ct1.75ct to 1.79ct1.79ct to 1.83ct
General Information
Chemical Formula
Mn
2+
 
Al(PO
 
4
)(OH)
 
2
H
 
2
O
Michael O’Donoghue, Gems, Sixth Edition (2006)
Photos of natural/un-cut material from mindat.org
Physical Properties of Eosphorite
Mohs Hardness5
Walter Schumann, Gemstones of the world (2001)
More from other references
Specific Gravity3.05 to 3.08
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Optical Properties of Eosphorite
Refractive Index1.639 to 1.672
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Optical CharacterBiaxial/-
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Birefringence0.025 to 0.030
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Colour
Colour (General)Colourless, yellow, yellowish-brown, pink
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
TransparencyTransparent,Translucent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
LustreVitreous
Walter Schumann, Gemstones of the world (2001)
Crystallography of Eosphorite
Crystal SystemMonoclinic
Walter Schumann, Gemstones of the world (2001)
More from other references
HabitPseudo-orthorhombic
Michael O’Donoghue, Gems, Sixth Edition (2006)
Geological Environment
Where found:Eosphorite occurs in granite pegmatites in association with Mn phosphates.
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Eosphorite information at mindat.org
Significant Gem Localities
Brazil
 
  • Minas Gerais
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