{"product_id":"phlogopite-mica-black-tourmaline-halite-and-orthoclase","title":"Phlogopite Mica,black Tourmaline,halite And Orthoclase","description":"\u003cp\u003ePhlogopite Mica,black Tourmaline,halite And Orthoclase from Erongo Mountain Erongo region Namibia\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e5.3cm x 5.6cm x 2.6cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e76g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003ePhlogopite mica:\u003cbr\u003eCrystal system- Monoclinic. It typically forms thick tabular crystals,pseudo-hexagonal prisms,or large sheets known as books.\u003cbr\u003eMineral class- Silicates (specifically a phyllosilicates or sheet silicate belonging to the mica group.\u003cbr\u003eRock formation- it commonly forms via contact metamorphism in magnesium- rich environments,such as metamorphosed dolomitic limestones and marbles.it also occurs as a primary magmatic mineral in silica poor,ultramafic igneous rocks like kimberlites and lamproites.\u003cbr\u003eHardness-2.5-3 on the MOHs scale\u003c\/p\u003e\n\u003cp\u003eBlack tourmaline:\u003cbr\u003eCrystal system-Trigonal. It forms elongated prismatic crystals that characteristically feature heavy vertical growth striations and a rounded triangular cross-section.\u003cbr\u003eMineral class- silicates \u003cbr\u003eRock formation- most commonly crystallizes in igneous granitic pegmatites from boron- rich hydrothermal fluids. It can also form in high-grade metamorphic rocks like schists and gneisses.\u003cbr\u003eHardness-7-7.5 on the MOHs scale\u003c\/p\u003e\n\u003cp\u003eHalite:\u003cbr\u003eCrystal system- Isometric. \u003cbr\u003eMineral class- halides\u003cbr\u003eRock formation- formed strictly in sedimentary environments. It precipitates out of solution as an evaporite deposits when landlocked seas,saline lakes,or salt flats dry up.\u003cbr\u003eHardness-2-2.5 on the MOHs scale\u003c\/p\u003e\n\u003cp\u003eOrthoclase:\u003cbr\u003eCrystal system-monoclinic. It often grows as prismatic or tabular crystals and regularly exhibits Carlsbad twinning,\u003cbr\u003eMineral class-silicates\u003cbr\u003eRock formation - primarily forms during the slow cooling of silica-rich intrusive igneous rocks like carnitas,syenites and pegmatites.it also commonly develops in high grade metamorphic rocks like gneiss.\u003cbr\u003eHardness- 6 on the MOHs scale\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62478733279619,"sku":null,"price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/IMG-0967.heic?v=1787944537","url":"https:\/\/crystalandfossils.co.uk\/products\/phlogopite-mica-black-tourmaline-halite-and-orthoclase","provider":"Crystal and fossils","version":"1.0","type":"link"}