Cave Clay

Cave Clay is an ingredient of Bone Clay, which is used to make Porcelain plates and ceramic meat grinders.

How to Acquire
Cave Clay is found in shallow water within Caves and appears as a Forage-able item.

How many Cave Clay you receive per spawn is dependent on your Nature(0.5x)/Industry(2x) Slider.

I found it with 600 exploration parameter.

As of November 8th, 2010 every clay has a specific color when kilned into bricks.

When Kilned Cave Clay makes Blue Bricks. .