{"product_id":"hamill-gilespie-cornwall-stone-50-pounds-rmcorstohg","title":"Cornwall Stone (Hammill \u0026 Gillespie)","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\u003ch2 class=\"abz-seo-product\"\u003eH\u0026amp;G Cornwall Stone\u003c\/h2\u003e\nHammill \u0026amp; Gillespie, a supplier of specialty clays and minerals, has found a substitute named H\u0026amp;G Cornwall Stone which can be used as a replacement in most glaze formulas. It is always best to test any new material, however, before committing to large scale production.\u003cbr\u003e\u003cbr\u003e Click here for the article from Ceramics Technical by Jeff Zamek about the differences and similarities of the original and the new: \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/HG-Cornwall-Stone.pdf?v=1685969503\"\u003ehttps:\/\/www.sheffield-pottery.live\/v\/vspfiles\/downloadables\/HG-Cornwall-Stone.pdf \u003c\/a\u003e\u003ciframe src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/HG-Cornwall-Stone.pdf?v=1685969503\" height=\"”800px;”\" width=\"”100%;”\"\u003e\u003c\/iframe\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286202089843,"sku":"RMCORSTOHG-1","price":3.4,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":45113707004226,"sku":"RMCORSTOHG","price":16.25,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286202122611,"sku":"RMCORSTOHG-10","price":31.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286202155379,"sku":"RMCORSTOHG-25","price":76.25,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286202188147,"sku":"RMCORSTOHG55","price":111.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/large-Cornwall_stone_sub.jpg?v=1696617509","url":"https:\/\/www.sheffield-pottery.live\/products\/hamill-gilespie-cornwall-stone-50-pounds-rmcorstohg","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}