{"product_id":"quartz-diorite-large-display-specimen-of-a-spectacular-subduction-related-igneous-rock","title":"quartz diorite - large hand\/display specimen of a spectacular subduction-related igneous rock","description":"\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cstrong\u003eQuartz diorite is intermediate between gabbro and granite and is often associated with subduction and the emplacement of subduction-related batholiths. It has a composition similar to the andesite of volcanic arcs. \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cstrong\u003eCommonly speckled black and white, quartz diorite is a member of a group of plagioclase feldspar-rich plutonic rocks, ranging from diorite with less than 5% quartz, to quartz diorite with 5% to 20% quartz to tonalite with over 20% quartz. The black mineral in this quartz diorite is biotite. The quartz diorite was emplaced in Late Jurassic as part of the Sierra Nevada batholith. These specimens were collected on the west side of the batholith, just upstream from the mouth of the Kern River gorge. When we showed it to other geologists, the first comment was, \"What a pretty rock.\" It is a pretty rock.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #990000;\"\u003e\u003cstrong\u003eFor scale, the pencil is 5 1\/2\" long. \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e\u003cstrong\u003eClick and click again to enlarge the QAPF diagram to see how this rock fits into the classification of intrusive igneous rocks.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eShipping\u003c\/span\u003e:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e By Priority Mail or USPS Ground Advantage, whichever is cheaper, unless we find a better rate. Click \u0026gt; \u003c\/b\u003e\u003ca href=\"https:\/\/geologicalspecimensupply.com\/pages\/about-shipping\"\u003e\u003cspan class=\"s2\" style=\"color: rgb(43, 0, 255);\"\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: rgb(255, 42, 0);\"\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\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003eMaking multiple purchases?\u003c\/b\u003e\u003c\/span\u003e\u003cspan\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\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Geological Specimen Supply","offers":[{"title":"Default Title","offer_id":28049997103191,"sku":"","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/7650\/files\/quartzdioritelargeH_D12.5pcl.jpg?v=1793604858","url":"https:\/\/geologicalspecimensupply.com\/products\/quartz-diorite-large-display-specimen-of-a-spectacular-subduction-related-igneous-rock","provider":"Geological Specimen Supply","version":"1.0","type":"link"}