Tags: sheen obsidian

Carved in Stone

Feb 01, 2011

Carved in Stone

O is for obsidian Although a relative youngster in geologic terms, obsidian can change over time from glass to mineral. By Bill Langer Obsidian (ŏb-sĭd’-ē-ən) noun – a usually black or banded, hard volcanic glass formed by rapid cooling of lava that displays ...

Read More...

SUBSCRIBE & FOLLOW

advertisement

TWITTER

FACEBOOK

BLOG

advertisement
advertisement