How to Use "obsidian" with Example Sentences

1. The texas show includes an obsidian mask that likely traveled to khara khorum all the way from egypt , lessem says .
2. Several years ago company saitek has released a wireless mouse saitek obsidian .
3. If obsidian is similar in composition to granite and rhyolite , both of which were originally molten , then why is obsidian glassy ?
4. Obsidian slides and great licking tongues ?
5. Also included in the find were scraping tools made of rare obsidian found on west fergusson island , 500 kilometres to the east .