Cobble Creek: 1 lb of Black Obsidian Rough from Mexico
Each pieces is 1" to 3" on average. Each pound will include anywhere from 7 - 10 pieces. This rough is good for jewelry, crafts, gifts, collecting or tumbling. Or for those teachers out there looking to complete a lesson on igneous rocks, this is one of the must haves for providing a hands on experience for their students.
Each pound will be a random pull from our bulk supply.
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.
Obsidian is produced when felsic lava extruded from a volcano cools rapidly with minimal crystal growth. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows, where the chemical composition (high silica content) induces a high degree of viscosity and polymerization of the lava. The inhibition of atomic diffusion through this highly viscous and polymerized lava explains the lack of crystal growth. Obsidian is hard and brittle and therefore fractures with very sharp edges. In the past it was used to manufacture cutting and piercing tools and it has been used experimentally as surgical scalpel blades.
1-2 business days
I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Just contact me within: 7 days of delivery
Ship items back to me within: 14 days of delivery
But please contact me if you have any problems with your order.
Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Oct 20, 2020
Nice pieces great price will purchase again
Sep 25, 2020
beautiful stones will buy again.
Sep 17, 2020
Sep 9, 2020
I'm buying more, they are so jet black and smooth.