{"product_id":"pyrolusite-26","title":"Pyrolusite","description":"\u003cp\u003ePyrolusite Natural Mineral From Atlas Mountains Morocco\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e5.2cm x 3.8cm x 2.3cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e50g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003eCrystal system:\u003cbr\u003ePyrolusite crystallizes in the tetragonal crystal system. It typically shares the same crystal structure as rutile. Well formed crystals are rare. It usually occurs in massive,granular or columnar habits,or as distinctive dendritic patterns.\u003c\/p\u003e\n\u003cp\u003eMineral class-\u003cbr\u003ePyrolusite belongs to the oxide mineral class. Its chemical composition is magnesium dioxide.\u003c\/p\u003e\n\u003cp\u003eRock formation -\u003cbr\u003eThe mineral forms primarily through sedimentary processes and secondary weathering. It develops in highly oxidation environments.\u003cbr\u003eOxidation zones-\u003cbr\u003eFormed when primary manganese bearing minerals undergo severe weathering and oxidation.\u003c\/p\u003e\n\u003cp\u003eSedimentary deposits-\u003cbr\u003ePrecipitated directly from water in shallow marine environments,bogs or lakes ,often forming nodules or beds.\u003c\/p\u003e\n\u003cp\u003eHydrothermal veins-\u003cbr\u003eDeposited by low temperature hydrothermal fluids passing through fractures.\u003c\/p\u003e\n\u003cp\u003eHardness-\u003cbr\u003eThe MOHs hardness of pyrolusite is 6-6.5 for distinct crystals. However because it commonly occurs in aggregate,earthy or fibrous masses, it frequently exhibits an apparent hardness as low as 1-2 .which readily soils the fingers with a black streak.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62145460535683,"sku":null,"price":10.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/IMG-9903.heic?v=1784907767","url":"https:\/\/crystalandfossils.co.uk\/products\/pyrolusite-26","provider":"Crystal and fossils","version":"1.0","type":"link"}