{"product_id":"dendritic-psilomelane-manganese-2","title":"Dendritic Psilomelane\/manganese","description":"\u003cp\u003eDendritic Psilomelane\/manganese Natural Mineral From Draa Valley Morocco\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e9cm x 6.2cm x 3.5cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e325g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003eDendritic Psilomelane (commonly referred to scientifically as a mixture primarily composed of romanechite and other manganese oxides) is a monoclinic manganese oxide.\u003c\/p\u003e\n\u003cp\u003eCrystal system- Monoclinic (though it rarely forms discrete macro-crystals, typically occurring as microcry,massive, or Botryoidal aggregates).\u003cbr\u003eMineral class- Oxide \u003cbr\u003eRock formation:\u003cbr\u003eRock setting-found typically as fracture fillings,surface coatings,or secondary dendrites inside sedimentary and low-temperature rocks such as limestone,sandstone and shales, as well as within weathered hydrothermal replacement deposits.\u003cbr\u003eFormation process- The fern like dendritic patterns are not fossilized plants. Instead,they form via low-temperature aqueous fluids (water) rich in dissolved manganese moving through microscopic cracks and fissures inside sedimentary the host rock. As the water evaporates or chemical conditions change,manganese oxides precipitate out in a fractal ,tree like crystal habit along the bedding planes or fracture surfaces.\u003cbr\u003eHardness-5-6 on the MOHs scale.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62477052543363,"sku":null,"price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/IMG-0917_16fc0db4-d4e7-49f2-99fd-ae204f2b6394.heic?v=1787928220","url":"https:\/\/crystalandfossils.co.uk\/products\/dendritic-psilomelane-manganese-2","provider":"Crystal and fossils","version":"1.0","type":"link"}