THIS sale IS FOR ONE: Blue Obsidian Natural Gemstone Round Oval Obsidian Gemstone Information About Obsidian - History and Introduction Obsidian is naturally occurring volcanic glass which has been used as a gemstone since antiquity. Obsidian was named after Obsius, a Roman who discovered a similar stone. Obsidian forms when lava cools and whilst it is mineral-like, it is not considered to be a true mineral because its composition is too complex and it does not have a crystalline structure. In addition to its decorative use, obsidian has a practical use. Due to its lack of cleavage, conchoidal fracture and acute edges when broken, it has been used to make smooth and sharp surgical scalpel blades. Obsidian has been used to make arrow heads and blades, as well as ornaments for thousands of years by people such as the pre-Columbian Mesoamericans and the ancient Egyptians. We offer volume discounts on BIN prices and combine shipping. Look in to Buy More Save More on our Buy it now items... Buy one item, no discount unless it's on sale. Buy two items get an additional 10% off. Buy Three items and get an additional 15% off. Buy 4 or more items and get an additional 20% off your order. Simply add the items to your shopping cart and discounts will apply. Many auctions ending today and every day. Thank you for looking in and shopping with us! Froo www.froo.com | Froo Cross Sell, Free Cross Sell, Cross promote, Marketing, listing Apps, Apps, Application