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