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Calcite


Babs

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I use whiting in my glazes (ion 50# bags finely ground)and also calcite in my water system to add minerals to my domestic water as its mineral free from the well. The calcite is many times the cost and is in a unground form (large crystals in 50# bags)-My guess is they are pretty close in makeup-the largest difference may be the cost.

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When Terri and I did our soda firing in January, we used a combo of soda ash, baking soda and whiting to form "plaster" chunks that we could throw into the firebox. This is an image of the leftover calcium carbonate that I had to break out of the firebox with a hammer after the firing. Terri said it looked like the stuff that sometimes forms next to hot springs, and wondered if if it might be calcite. It was sort of sculptural, so I took some chunks home. They crumbled back into powder within a couple of weeks, as they absorbed moisture from the air.

post-63667-0-54310400-1490630070_thumb.jpeg

post-63667-0-54310400-1490630070_thumb.jpeg

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