Tags: snowflake obsidian
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
BLOG
advertisement
POPULAR READS
- Vulcan shareholders reject board changes at annual meeting929 Views
- Excavators uncover ancient quarry in Jerusalem912 Views
- Former gravel quarry-turned-landfill transforms into nature reserve355 Views
- Americans consume 3 million pounds of minerals in a lifetime223 Views
- Diesel fuel price report: May 13, 2013183 Views
advertisement
