Snowflake obsidian
Like obsidian, this rock is composed of a high percentage of glass rather than crystals.
The characteristic pale “snowflakes” are patches where the glass has become devitrified around distinct centers.
TEXTURE This is an extremely fine-grained rock. It also displays microcrystalline patches of white color.
ORIGIN A volcanic rock, snowflake obsidian is formed from lava that has cooled rapidly.
Group: IGNEOUS
Origin: Extrusive
Grain size: Very fine
Crystal shape: Anhedral
Classification: Felsic
Occurrence: Volcano
Color: Dark
