

⚡️ Elevate your craft with the black clay that professionals swear by!
SIO-2 PRNI Black High Fire Stoneware Clay is a premium 27.6 lb natural modeling clay designed for both wheel throwing and hand building. Firing at Cone 5-6 (1200ºC-1240ºC), it features 40% impalpable grog for enhanced stability and durability. This smooth, plastic, and consistent black stoneware is non-toxic, ACMI AP-certified, and ideal for use with zinc-free glazes, making it a trusted choice for professional potters and serious amateurs alike.









| ASIN | B0C2TXWVZ3 |
| Age Range (Description) | Adult |
| Best Sellers Rank | #125,518 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #576 in Pottery & Modeling Clays |
| Brand | SIO-2 |
| Color | PRNI Black |
| Customer Reviews | 3.8 3.8 out of 5 stars (35) |
| Date First Available | April 18, 2023 |
| Educational Objective | Creative Skill |
| Included Components | Clay |
| Item Weight | 27.5 pounds |
| Item dimensions L x W x H | 12 x 6 x 3 inches |
| Item model number | 8422830136018 |
| Manufacturer | SIO-2 |
| Material | Natural Stoneware Clay |
| Model Name | PRNI Black Stoneware |
| Number of Items | 1 |
| Product Dimensions | 12 x 6 x 3 inches |
| Recommended Uses For Product | Modeling, Pottery |
| Special Feature | Refractary |
S**N
Wonderful
Love the texture. It’s easy to throw. Great consistency
J**R
Love This Clay
So easy to work with and every time it comes out exactly how I want it to. My customers love it.
C**S
Disappointing results
Disappointed with the speckled clay. I was very excited to fire this clay but the grog is massive. When fired it is very bumpy and sharp. Ruined integrity of the glaze. I wouldn’t recommend this speckled clay and won’t buy again.
M**D
Great workable clay!
This clay has the perfect moisture level. It is easy to center and to raise walls on the wheel. It is equally good for handbuilding.
T**A
Grog led to poor firing results
I am a professional potter of almost 20 years. While the clay is definitely throwable, it is very groggy and the grog pieces are very large. During glaze firing, those pieces expanded to a point where they made the surface, extremely bumpy and even sharp. I will not be buying again.
M**A
So far so good.
I love that a bag and zip tie is provided. The clay was easy to work with and good quality. Will definitely purchase again. Can’t wait to see the results after it’s fired.
L**R
Love it!!
OMG!! I love love this clay Super messy but worth it Buy it Buy it!!
S**R
The clay is fine. The shipping leaves a lot to be desired.
it’s very heavy. I know it’s hard to ship, but by the time it got to me, the box was falling apart, and as soon as you see the box, you knew that it was a giant lump of clay, which wasn’t ideal for something being delivered as a Christmas present
S**Y
So easy to work with, will buy again
Trustpilot
1 month ago
1 month ago