Snowflake obsidian is a striking black, lustrous opaque stone with grayish/white bold markings, much like the beautiful patterns of snowflakes on a black background. It is a form of volcanic, amorphous, siliceous glassy rock. This form of obsidian is found in Utah.
Snowflake obsidian is said to sharpen both the external and the internal vision. It is one of the most important “teachers” of the New Age stones. It is the warrior of truth, and shows the self where the ego is at, and what it must change in order to advance to the next step of evolutionary growth.
SOURCE: Truth about Crystal Healing, Phyllis Galde