Snowflake Obsidian

Big Photo

Mexico
21.02 carats
© gemselect.com

Snowflake Obsidian is a variety of Obsidian, that has black body colour and numerous small radiating inclusions of cristobalite.

Snowflake Obsidian is cut and polished.

Snowflake Obsidian Gemstones by Colour

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

Snowflake Obsidian Gemstones by Size

This table shows distribution of Snowflake Obsidian 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:15.42 cts
Heaviest:55.26 cts
Average:31.47 cts
Total photos:16
Do you have a larger Snowflake Obsidian? Why not upload a photo?
15.42ct to 19.40ct19.40ct to 23.39ct23.39ct to 27.37ct27.37ct to 31.36ct31.36ct to 35.34ct35.34ct to 39.32ct39.32ct to 43.31ct43.31ct to 47.29ct47.29ct to 51.28ct51.28ct to 55.26ct
General Information
A variety or type of:Obsidian, which is a variety of Glass
Photos of natural/un-cut material from mindat.org
Physical Properties of Snowflake Obsidian
Mohs Hardness5 to 5.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity2.33 to 2.50+
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Snowflake Obsidian
Refractive Index1.450 to 1.550
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Optical CharacterIsotropic
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Black with white patches.
Gemdat.org, Management Team (2012)
TransparencyTransparent,Translucent,Opaque
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Snowflake Obsidian
Crystal SystemAmorphous
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
HabitMassive
Arthur Thomas, Gemstones (2009)
Further Information
Mineral information:Snowflake Obsidian information at mindat.org
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