{"product_id":"mica-on-quartz","title":"Mica on Quartz","description":"\u003cp\u003eMica on Quartz from Portugal\u003c\/p\u003e\n\u003cp\u003eSize-\u003cbr\u003e7.1cm x 6.1cm x 2.1cm\u003c\/p\u003e\n\u003cp\u003eWeight-\u003cbr\u003e143g\u003c\/p\u003e\n\u003cp\u003eYou will receive the item in the photo\u003c\/p\u003e\n\u003cp\u003eQuartz:\u003cbr\u003eQuartz is the second most abundant mineral in the continental crust and consists entirely of silicon dioxide.\u003cbr\u003eCrystal system- Trigonal (low temperature) High temperature quartz is hexagonal. It commonly displays a habit of six-sided hexagonal prisms terminating in pyramids.\u003c\/p\u003e\n\u003cp\u003eMineral class- Silicates (specifically Tectosilicate)\u003c\/p\u003e\n\u003cp\u003eRock formation:\u003cbr\u003eQuartz is highly resistant to weathering and found universally across all three major rock families,\u003cbr\u003eIgneous- It crystallizes last from cooling silica-rich magmas,filling the voids in intrusive rock like granite and magmatic pegmatites.\u003cbr\u003eSedimentary- It forms the primary component of weathered sandstones,siltstones and chert.\u003cbr\u003eMetamorphic- It creates quartzites through the recrystallisation of sandstone and is heavily present in schists and gneisses.\u003c\/p\u003e\n\u003cp\u003eMica:\u003cbr\u003eMica is a broad group of 37 chemically distinct silicate minerals,most famously known for their perfect basal cleavage that allows them to split into incredibly thin flexible sheets. \u003cbr\u003eCrystal system- monoclinic\u003cbr\u003eMineral class- silicates ( specifically phyllosilicate\u003cbr\u003eRock formation: mica is highly petrogenetically significant and serves as a major rock-forming component across various geological environments.\u003cbr\u003eIgneous- it crystallizes early to mid stage in intrusive igneous environments,creating massive distinct crystalline layers or books within felsic pegmatites.\u003cbr\u003eMetamorphic- it is the defining mineral behind the flaky,aligned texture seen in rocks like mica schist,gneiss,phyllite and slate.\u003cbr\u003eSedimentary- Tiny reflective flakes can occasionally survive erosion to settle within clastic rocks like sandstones and shales.\u003c\/p\u003e","brand":"Crystal and fossils","offers":[{"title":"Default Title","offer_id":62254395130243,"sku":null,"price":6.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0563\/2524\/3040\/files\/FullSizeRender_b118558b-958d-43ac-933e-02dc0269e59a.heic?v=1785430187","url":"https:\/\/crystalandfossils.co.uk\/products\/mica-on-quartz","provider":"Crystal and fossils","version":"1.0","type":"link"}