{"product_id":"copy-of-perlite-teaching-hand-display-specimen-of-gray-perlite-ore-an-amorphous-hydrated-glass","title":"perlite - teaching hand\/display specimen of gray perlite ore - an amorphous hydrated glass with embedded Apache tears","description":"\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cb\u003ePerlite is a hydrated form of obsidian. When a mass of obsidian picks up water, it devitrifies and becomes amorphous perlite. The unhydrated core of the obsidian mass may weather out as an obsidian spherule called an Apache tear. The \u003cmeta charset=\"utf-8\"\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cb\u003efield photo shows Apache tears weathering out of a dark perlite at the Umpire perlite mine in the Goodsprings mining district, Nevada.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cb\u003ePerlite can also form by the sudden cooling and solidification of rhyolitic volcanic ash, which traps water into its mass.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan color=\"#6d1b05\" style=\"color: #990000;\"\u003e\u003cb\u003ePerlite is mined, partly dried in a rotary kiln and screened to various sizes depending on its final application. To make the white perlite \"rice krispies\" found in garden supplies and nurseries, the partly dried perlite is heated to 1,600˚F. The internal water flashes to steam and the perlite pops, just like popcorn, and changes from gray to white. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cb\u003eThis perlite was collected from a deposit in the Big Pine volcanic field in Inyo County, California.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan color=\"#6d1b05\" style=\"color: #990000;\"\u003e\u003cb\u003ePerlite ore ranges from gray to black, with the black looking just like weathered obsidian, which it is. We also stock the partly dried and screened perlite in the \"before popping\" stage as well as the final product.  The series, from ore partly dried to final product makes a useful teaching set. These forms are available in a set of two 2-ounce jars .\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003eMaking multiple purchases?\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e Click on the \"combine shipping\" button in the shopping cart. We'll send an invoice with combined shipping. A link in that invoice will bring you back to checkout, no hassle. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\" style=\"color: #ff2a00;\"\u003e\u003cb\u003eShipping:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e By Priority Mail. Click \u0026gt; \u003c\/b\u003e\u003ca href=\"https:\/\/geologicalspecimensupply.com\/pages\/about-shipping\"\u003e\u003cspan class=\"s2\" style=\"color: #2b00ff;\"\u003e\u003cb\u003ehere\u003c\/b\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cb\u003e \u0026lt; for shipping rates. See comment at \u003c\/b\u003e\u003cspan class=\"s1\" style=\"color: #ff2a00;\"\u003e\u003cb\u003eNote!\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e Use back button to return to this page.\u003c\/b\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Geological Specimen Supply","offers":[{"title":"Default Title","offer_id":40070597476439,"sku":"","price":9.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/7650\/files\/perliteH_D9.5pcl.jpg?v=1787819468","url":"https:\/\/geologicalspecimensupply.com\/products\/copy-of-perlite-teaching-hand-display-specimen-of-gray-perlite-ore-an-amorphous-hydrated-glass","provider":"Geological Specimen Supply","version":"1.0","type":"link"}