Almandine-Pyrope

Big Photo

RhodoliteRhodolite Garnet Starbrite Cut
46.17 carats
© johndyergems.com

Garnets intermediate between Almandine and Pyrope.

Almandine-Pyrope Gemstones by Colour

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

Almandine-Pyrope Gemstones by Size

This table shows distribution of Almandine-Pyrope 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:0.29 cts
Heaviest:46.17 cts
Average:3.43 cts
Total photos:102
Do you have a larger Almandine-Pyrope? Why not upload a photo?
0.29ct to 4.88ct4.88ct to 9.47ct9.47ct to 14.05ct14.05ct to 18.64ct18.64ct to 23.23ct23.23ct to 27.82ct27.82ct to 32.41ct32.41ct to 36.99ct36.99ct to 41.58ct41.58ct to 46.17ct
General Information
A variety or type of:Garnet Group
Varieties/Types:
Rhodolite - A rose-red variety of Garnets from the Almandine to pyrope series.
Other Names/Trade Names:
Chemical Formula
(Fe,Mg)
 
3
Al
 
2
(SiO
 
4
)
 
3
gemdat.org, Management Team (2012)
Photos of natural/un-cut material from mindat.org
Physical Properties of Almandine-Pyrope
Mohs Hardness7.5 to 0
gemdat.org, Management Team (2012)
Specific Gravity3.62 to 4.20
gemdat.org, Management Team (2012)
Cleavage QualityNone
gemdat.org, Management Team (2012)
FractureConchoidal
gemdat.org, Management Team (2012)
Optical Properties of Almandine-Pyrope
Refractive Index1.730 to 1.810
gemdat.org, Management Team (2012)
Optical CharacterIsotropic
gemdat.org, Management Team (2012)
Dispersion0.022 to 0.027
gemdat.org, Management Team (2012)
Colour
Colour (General)Red, purple-red, pinkish red, red-orange, deep red to almost black
gemdat.org, Management Team (2012)
Causes of ColourReddish purple (rhodolite), Fe2+ in distorted cubic coordination
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent
gemdat.org, Management Team (2012)
LustreVitreous
gemdat.org, Management Team (2012)
Crystallography of Almandine-Pyrope
Crystal SystemIsometric
gemdat.org, Management Team (2012)
Further Information
Mineral information:Almandine-Pyrope information at mindat.org
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