{"title":"Hematite","description":"\u003cp\u003eAlthough there are actually a number of different iron oxides the two most important ones are hematite and magnetite. Hematite is iron(III)oxide and magnetite is iron(II)oxide.\u003c\/p\u003e\n\u003cp\u003eHematite needs an aqueous environment and plenty of water to form. So the presence of hematite implies that those two conditions are satisfied. Hematite occurs in banded iron formations (BIF). Banded iron formations are some of the oldest rocks on earth and the presence of the hematite is due to the oxygenation of the Earth's early oceans. \u003c\/p\u003e\n\u003cp\u003eLike all minerals, hematite can form geometric euhedral crystals. It is more common to find it in a bottroydial habit. Hematite varies in colour from silver to red, however it always has a red streak when it is run across a white ceramic tile, and has a red powder when ground. Hematite and hematite rich soils have been used in pigment since prehistory and play an important role in the very first human art.\u003c\/p\u003e\n\u003cp\u003eHematite is not actually magnetic and the various forms of magnetic hematite are actually industrial compounds and not hematite at all.\u003c\/p\u003e","products":[{"product_id":"bottroydial-hematite","title":"Hematite (bottroydial)","description":"\u003cp\u003e\u003cstrong\u003eBottroydial Hematite, Morocco\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBottroydial means bunch of grapes. These are some pretty strange grapes! \u003c\/p\u003e\n\u003cp\u003eHemaite is an iron oxide. There are a number of iron oxides which are distinguished by the different oxidation states of iron, as well as their structure. Hematite generally requires water to form and is also indicative of the presence of oxygen. In anerobic enviroments; iron tends to form sulphides. Hematite is not magnetic. \"Magnetic hematite\" is a manmade material.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAll prices are per item. Photographs are representative of the items on offer, but the item you buy may not be the one in the photograph\u003c\/em\u003e\u003c\/p\u003e","brand":"The Science of Magic","offers":[{"title":"Default Title","offer_id":33003430084652,"sku":"","price":3.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0353\/5057\/7196\/products\/20210222_152810-2_02c83eb9-7d2a-4b76-9de0-66aa2e0b74fd.jpg?v=1614008526"},{"product_id":"specularite-the-real-star-stone","title":"Specularite -- the real star stone","description":"\u003cp\u003e\u003cstrong\u003eHematite var. Specularite. Upper Peninsula, Michigan, USA\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"real starstone\". These are slices of specularite -- tiny crystals of hematite and magnetite which catch the light. Raw specularite is generally very crumbly and turns to powder during handling. These pieces have been stabilised and are coated with resin to keep their integrity.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eItem weight, 26g. The price is for one individual item. The photograph is representative of the items for sale, but the item recieved may not be the one in the picture.\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"The Science of Magic","offers":[{"title":"Default Title","offer_id":33021339336748,"sku":"xtl48","price":10.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0353\/5057\/7196\/products\/specularite2_0c325eab-ae15-4d72-a0b4-2f3771861b27.jpg?v=1619289851"},{"product_id":"banded-iron-formation","title":"Banded Iron formation","description":"\u003cp\u003e\u003cstrong\u003eBanded Tiger Iron\u003c\/strong\u003e\u003cbr\u003e\u003cspan data-mce-fragment=\"1\"\u003eAge: Archean. (3.1 billion years ago)\u003c\/span\u003e\u003cbr\u003eLocation:  Ord Ranges, Cleaverville Formation,West Australia \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBanded Iron formations consist of thin laminated bands of chert and hematite, frequently in association with tiger eye. They are always very ancient, ranging from 3.8 billion years ago until 1.2 billion years ago (with a brief reoccurrence between 800-600 million years ago during snowball earth). The hematite in these formations are due to the precipitation of iron oxide, which occurred when dissolved iron came in contact with oxygenated seawater. The oxygenation of the ocean was due to the arrival of cyanobacetia, which release oxygen as a byproduct of photosynthesis.\u003c\/p\u003e\n\u003cp\u003eEventually so much oxygen was released by cyanobacteria that the Earth's atmosphere changed. This led to the great oxygenation event which occurred between 2.4 and 2.2 billion years ago. Up to this point all life on Earth had occurred in an anaerobic environment. The change in oxygen levels probably lead to the Earth's first mass extinction event and changed the nature of the Earth forever. Life remade the world and banded iron formations mark this miraculous moment.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThis photograph is of the item offered for sale.\u003c\/em\u003e\u003c\/p\u003e","brand":"The Science of Magic","offers":[{"title":"Default Title","offer_id":36934293094550,"sku":"","price":73.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0353\/5057\/7196\/products\/bif9.jpg?v=1605021423"},{"product_id":"banded-iron-formation-1","title":"Banded Iron Formation","description":"\u003cp\u003e\u003cstrong\u003eBanded Iron Formation \u003cbr\u003e\u003c\/strong\u003eAge: Archean (approximately 3.1 billion years ago) \u003cbr\u003eLocation: Cleaverville Formation, Ord Range, West Australia \u003c\/p\u003e\n\u003cp\u003eBanded Iron formations consist of thin laminated bands of chert and hematite, frequently in association with tiger eye. They are always very ancient, ranging from 3.8 billion years ago until 1.2 billion years ago (with a brief reoccurrence between 800-600 million years ago during snowball earth). The iron banding in these formations are due to the precipitation of iron oxide, which occurred when dissolved iron came in contact with oxygenated seawater. The oxygenation of the ocean was due to the arrival of cyanobacetia, which release oxygen as a byproduct of photosynthesis.\u003c\/p\u003e\n\u003cp\u003eEventually so much oxygen was released by cyanobacteria that the Earth's atmosphere changed. This led to the great oxygenation event which occurred between 2.4 and 2.2 billion years ago. Up to this point all life on Earth had occurred in an anaerobic environment. The change in oxygen levels probably lead to the Earth's first mass extinction event and changed the nature of the Earth forever. Life remade the world and banded iron formations mark this miraculous moment.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThis photograph is of the item offered for sale.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"The Science of Magic","offers":[{"title":"Default Title","offer_id":36997543002262,"sku":"","price":55.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0353\/5057\/7196\/products\/bifsmallraw.jpg?v=1605104088"}],"url":"https:\/\/scienceofmagic.co.uk\/collections\/hematite-s\/hematite.oembed","provider":"The Science of Magic ","version":"1.0","type":"link"}