{"product_id":"wollastonite-w-20-325m-5-pound-unit-rmwolw20","title":"Wollastonite W-20 (325 Mesh)","description":"\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eYou must test before you use it, at any scale.\u003c\/strong\u003e Raw materials, mined or man-made, are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003cspan\u003e\u003c\/span\u003eWOLLASTONITE W-20 325M \u003cbr\u003e Wollastonite, a calcium metasilicate (CaSiO3), has a theoretical composition of 48.3% calcium oxide and 51.7% silicon dioxide but may contain trace to minor amounts of aluminum, iron, magnesium, manganese, potassium, and sodium.  It occurs as prismatic crystals that cleave into massive-to-acicular fragments.  It is usually white, but also may be gray, brown, or red depending on its composition.  Deposits of wollastonite have been found in Arizona, California, Idaho, Nevada, New Mexico, New York, and Utah.  These deposits are typically skarns containing wollastonite as the major component and calcite, diopside, garnet, idocrase, and (or) quartz as minor components.  Major uses for wollastonite are in plastics, ceramics, metallurgy, paint, and friction products","brand":"Sheffield Pottery","offers":[{"title":"5 Pounds","offer_id":45113764839746,"sku":"RMWOLW20","price":9.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286206447987,"sku":"RMWOLW20-10","price":18.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286206480755,"sku":"RMWOLW20-25","price":42.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":67286206513523,"sku":"RMWOLW2050","price":41.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/large-Wollastonite_powder_7903b8c6-fda8-4485-9eb2-77a22f254ddb.jpg?v=1696967758","url":"https:\/\/www.sheffield-pottery.live\/products\/wollastonite-w-20-325m-5-pound-unit-rmwolw20","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}