Important information regarding Tariffs. READ HERE

CloseClose

Obsidian Cone 5

Description

Description

(Formerly Cassius Basaltic)

Fired Shrinkage is 14.5% and Water Absorption is .5%

when fired to cone 5. Very black, ebony like finish. Contains no talc. Needs lots of oxygen during bisque firing. Please refer to this link for our 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 www.P65Warnings.ca.gov

Product form

(Formerly Cassius Basaltic) Fired Shrinkage is 14.5% and Water Absorption is .5% when fired to cone 5. Very black, ebony... Read more

Buy 5 boxes and save $2.00 per box!
Buy 10 boxes and save $3.00 per box!
Buy 20 boxes and save $4.00 per box!
Free pickup in our shop(s)

SKU: ACOBSIDIAN

$80.48 $72.00

Buy 5 boxes and save $2.00 per box!
Buy 10 boxes and save $3.00 per box!
Buy 20 boxes and save $4.00 per box!

1 in stock

 More payment options
      Quick Reference

    Brand: Aardvark Clay

    Firing Range(s): Cone 4-5 "Safe" Mid-Fire

    Color: Black

    Clay Texture: Smooth

    Most often used as Throwing clays

    Download Safety Data Sheet as a PDF
    Description

    Description

    (Formerly Cassius Basaltic)

    Fired Shrinkage is 14.5% and Water Absorption is .5%

    when fired to cone 5. Very black, ebony like finish. Contains no talc. Needs lots of oxygen during bisque firing. Please refer to this link for our 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 www.P65Warnings.ca.gov

    Resources

    Recently viewed products

    © 2025 Brackers Good Earth Clays, Powered by Shopify

      • American Express
      • Apple Pay
      • Diners Club
      • Discover
      • Google Pay
      • Mastercard
      • PayPal
      • Shop Pay
      • Venmo
      • Visa

      Login

      Forgot your password?

      Don't have an account yet?
      Create account