{"title":"fluorescent minerals","description":"","products":[{"product_id":"calcite-fluorescent-and-phosphorescent-calcite-cleavage-rhomb-from-the-challenger-cave-system-nuevo-leon-mexico","title":"calcite - hot pink fluorescent and phosphorescent calcite cleavage rhomb from the Challenger Cave system, Nuevo Leon, Mexico","description":"\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003eCalcite, CaCO\u003c\/b\u003e\u003cb\u003e\u003csub\u003e3, \u003c\/sub\u003e\u003c\/b\u003e\u003cb\u003eis an extremely common rock forming mineral. In pegmatites it forms large masses and it makes up some limestones almost entirely. It has a large variety of crystal forms, but these do not include the rhombus-shaped pieces that are sold as “calcite crystals.” The rhombs are produced by cleaving calcite in three directions between rows of atoms. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003eWhen calcite is free of impurities and is optically clear, it exhibits double refraction. When it is placed above a line drawn on paper and rotated, the drawn line doubles and becomes single depending on the angle of rotation. These are not clear enough to show double refraction.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003eUnder longwave ultraviolet, these specimens fluoresce hot pink. The first photo shows this fluorescence. The second photo compares the hot pink fluorescing calcite with some from the same locality that fluoresces a cooler pink. The third photo \u003cmeta charset=\"utf-8\"\u003eshows what to expect under shortwave, though it may be paler than what the camera picked up. These can have a bluish-white or mottled shortwave response as well, with all showing excellent phosphorescence that is fairly slow to extinguish.  \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003e\u003cstrong\u003eIn a phosphorescent substance, electrons that absorb energy slowly re-emit it, sometimes glowing for minutes or even hours as they return to their original energy states. Most phosphorescent compounds are fast emitters, however, with lifetimes on the order of milliseconds. You can watch this calcite extinguish as the atoms return to their normal energy state after exciting it with shortwave for a few seconds.\u003c\/strong\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(109, 3, 3);\"\u003e\u003cb\u003eThese clean sharp rhombs of colorless calcite are from the Challenger Cave system near Monterrey, Nuevo Leon, Mexico, a famous locality for fluorescent calcite. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eIf tiny rhombs would be useful in your classroom, let us know and we'll include some, though not of this calcite, for student experimenting and \u003c\/b\u003e\u003cb\u003eso you can demonstrate the calcium carbonate response to a drop of hydrochloric acid - it fizzes and releases carbon dioxide - without wrecking this example.\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eYou will need a strong and well-filtered shortwave lamp to see the bluish fluorescence and the phosphorescent decay after the lamp is extinguished. We can recommend The Triple, sold by Way Too Cool, LLC at \u003cspan style=\"color: rgb(0, 0, 0);\"\u003ehttps:\/\/www.fluorescents.com\/products-the-triple.html. It will give you short, medium  and longwave ultraviolet.\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eFor the hot pink fluorescence, any ultraviolet flashlight - they are all long wave - will work. Way Too Cool has those as well.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003eClick on an image to enlarge and click again to further enlarge. The pen is 5\" long, for  scale. The pencil is 5 1\/2\" long.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\" style=\"color: #ff2a00;\"\u003e\u003cb\u003eSelect a specimen:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e When more than one specimen is shown, you can select a particular specimen by telling us what is in the photo with it, a black and silver pen, a black mechanical pencil (it has an eraser), or one of those plus some number of coins, or you can let us make the selection.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\" style=\"color: rgb(255, 42, 0);\"\u003e\u003cb\u003eMaking multiple purchases?\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e \u003c\/span\u003eClick on the \"combine shipping\" button in the shopping cart. We'll send an invoice with combined shipping. It may not be instantaneous, since a human has to take a look and we might be out in the field during the day. A link in that invoice will bring you back to checkout, no hassle.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e\u003cspan style=\"color: #ff2a00;\"\u003eShipping\u003c\/span\u003e:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e By Priority Mail or USPS Ground Advantage, whichever is cheaper. Click \u0026gt; \u003c\/b\u003e\u003ca href=\"https:\/\/geologicalspecimensupply.com\/pages\/about-shipping\"\u003e\u003cspan style=\"color: #2b00ff;\" class=\"s2\"\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 style=\"color: #ff2a00;\" class=\"s1\"\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","brand":"Geological Specimen Supply","offers":[{"title":"Default Title","offer_id":42518381166679,"sku":null,"price":12.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/7650\/files\/calciteNLhotpinklwu_v.jpg?v=1770626146"},{"product_id":"calcite-pink-fluorescent-and-phosphorescent-calcite-cleavage-rhomb-from-the-challenger-cave-system-nuevo-leon-mexico","title":"calcite - cool pink fluorescent and phosphorescent calcite cleavage rhomb from the Challenger Cave system, Nuevo Leon, Mexico","description":"\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003eCalcite, CaCO\u003c\/b\u003e\u003cb\u003e\u003csub\u003e3, \u003c\/sub\u003e\u003c\/b\u003e\u003cb\u003eis an extremely common rock forming mineral. In pegmatites it forms large masses and it makes up some limestones almost entirely. It has a large variety of crystal forms, but these do not include the rhombus-shaped pieces that are sold as “calcite crystals.” The rhombs are produced by cleaving calcite in three directions between rows of atoms. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003eWhen calcite is free of impurities and is optically clear, it exhibits double refraction. When it is placed above a line drawn on paper and rotated, the drawn line doubles and becomes single depending on the angle of rotation. These are not clear enough to show double refraction.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003eUnder longwave ultraviolet, these specimens fluoresce a cool pink. The first photo shows this fluorescence. Under shortwave, these specimens exhibit a bluish fluorescence and also a blue to white phosphorescence that extinguishes slowly enough to watch. Second photo compares the hot pink and cool pink fluorescing calcite. The last photo shows what to expect under shortwave, though it may be paler than what the camera picked up.  These can have a bluish-white or mottled shortwave phosphorescent response as well, with all of these examples showing excellent phosphorescence.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(123, 10, 10);\"\u003e\u003cb\u003e\u003cstrong\u003eIn a phosphorescent substance, electrons that absorb energy slowly re-emit it, sometimes glowing for minutes or even hours as they return to their original energy states. Most phosphorescent compounds are fast emitters, however, with lifetimes on the order of milliseconds. You can watch this calcite extinguish as the atoms return to their normal energy state after exciting it with shortwave for a few seconds.\u003c\/strong\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(109, 3, 3);\"\u003e\u003cb\u003eThese clean sharp rhombs of colorless calcite are from the Challenger Cave system near Monterrey, Nuevo Leon, Mexico, a famous locality for fluorescent calcite. \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eIf tiny rhombs would be useful in your classroom, let us know and we'll include some, though not of this calcite, for student experimenting and \u003c\/b\u003e\u003cb\u003eso you can demonstrate the calcium carbonate response to a drop of hydrochloric acid - it fizzes and releases carbon dioxide - without wrecking this example.\u003c\/b\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eYou will need a strong and well-filtered shortwave lamp to see the bluish fluorescence and  phosphorescent decay after the lamp is extinguished. We can recommend The Triple, sold by Way Too Cool, LLC at \u003cspan style=\"color: rgb(0, 0, 0);\"\u003ehttps:\/\/www.fluorescents.com\/products-the-triple.html. It will give you short, medium  and longwave ultraviolet.\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eFor the pink fluorescence, any ultraviolet flashlight - they are all long wave - will work. Way Too Cool has those as well.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003eClick on an image to enlarge and click again to further enlarge. The pen is 5\" long, for  scale.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: #ff2a00;\" class=\"s1\"\u003e\u003cb\u003eSelect a specimen:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e When more than one specimen is shown, you can select a particular specimen by telling us what is in the photo with it, a black and silver pen, a black mechanical pencil (it has an eraser), or one of those plus some number of coins, or you can let us make the selection.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\" class=\"s1\"\u003e\u003cb\u003eMaking multiple purchases?\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e \u003c\/span\u003eClick on the \"combine shipping\" button in the shopping cart. We'll send an invoice with combined shipping. It may not be instantaneous, since a human has to take a look and we might be out in the field during the day. A link in that invoice will bring you back to checkout, no hassle.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003e\u003cspan style=\"color: #ff2a00;\"\u003eShipping\u003c\/span\u003e:\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e By Priority Mail or USPS Ground Advantage, whichever is cheaper. 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","brand":"Geological Specimen Supply","offers":[{"title":"Default Title","offer_id":42525162995799,"sku":null,"price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0960\/7650\/files\/IMG_13682.jpg?v=1775203147"}],"url":"https:\/\/geologicalspecimensupply.com\/collections\/fluorescent-minerals.oembed","provider":"Geological Specimen Supply","version":"1.0","type":"link"}