Snowflake obsidian is a form of volcanic ... It appears as a dark glassy rock that’s typically black, although it can take on hues of green, brown, and other colors due to impurities.

Obsidian is perhaps best known in its role as the dark black blade atop ancient spears ... including shades of green, purple, and blue. Colorful, sure, but we’d say it reminds us more of an ...