{"product_id":"aragonite-stalactite-cave-calcite-santa-eulalia-5","title":"Aragonite stalactite \"cave calcite,\" Santa Eulalia (medium)","description":"\u003cp\u003e\u003cstrong\u003eLocale:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eSanta Eulalia Mining District, Chihuahua, Mexico\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApprox size:\u003c\/strong\u003e 3 x 2.5 x 1.5\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApprox weight: \u003c\/strong\u003e90g\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eGlittering near-white aragonite stalactites, commonly called “cave calcite,” are one of the prized minerals sourced from the reputed Santa Eulalia mining district in Mexico. The stalactites are shaped like the love child of coral and icicles, with icy translucent crystals, intricate branching, and elongated needles radiating out.\u003c\/p\u003e\n\u003cp\u003eStalactitic aragonite is a type of cave growth known as 'spar' due to the formation of distinct crystal faces. Spar, also known as 'pool spar,' typically grows underwater in solutions rich in calcium carbonate (CaCO3). Calcite and aragonite are both composed of calcium carbonate (meaning they are polymorphs of one another) and the two minerals frequently co-mingle in cave environments; this specimen is technically more of a blend of the two minerals, with aragonite primary.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUV REACTIVITY\u003c\/strong\u003e as an aragonite-based mineral, this material has very good UV reactivity. The reaction is strongest under a shortwave UV light (UVC\/255 nm), with bright yellow-green fluorescence. The fluorescence shows moderately under midwave (UVB\/310 nm), and appears white and weakly green under longwave (UVA\/365 nm).\u003c\/p\u003e\n\u003cp\u003eUV images use the WTC All-Wave UV LED flashlight.\u003c\/p\u003e","brand":"Pretty Ugly Things","offers":[{"title":"Default Title","offer_id":48066783215767,"sku":null,"price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0639\/5192\/9495\/files\/IMG_0811_572aedc3-d1c5-4ae2-9bb1-08beb7fb6378.jpg?v=1784957340","url":"https:\/\/prettyuglythingsaz.com\/products\/aragonite-stalactite-cave-calcite-santa-eulalia-5","provider":"Pretty Ugly Things","version":"1.0","type":"link"}