Aardvark Obsidian (formerly Cassius Basaltic) Cone 5

Minimum Purchase:
25 units
Unit Quantity:
Amount you need IN POUNDS
25 pounds (1 bag)

Product Overview

Aardvark Clay's Obsidian (formerly Cassius Basaltic - boxes might have the old name on them as they transition)

Fired Shrinkage is 14.5% and Water Absorption is .5% when fired to cone 5. Very black, ebony like finish. Needs lots of oxygen during bisque firing.
Please refer to this link for a bisque firing schedule that was created with Obsidian in mind.

⚠ WARNING - This product can expose you to crystalline silica (quartz) which is known to the State of California to cause cancer. For more information, go to