Hematite This mineral comes in many forms both metallic and nonmetallic such as botryoidal known as kidney ore micaceous and foliated known as specular; and earthy oolitic iron roses But regardless of its form it can always be identified by its characteristic red streak Steel grey to black in crystals and massively crystalline
Hematite is a mineral form of iron oxides and major iron ore It is harder but more brittle than pure iron and colors can range from black to steel gray brown and red Its botryoidal variety is commonly referred to as Kidney Ore Kidney ore s globular bubbly shape is a result of layered growth around a nucleus such as a speck of sand or
Hematite is often a gunmetal grey to black but fine grained specimens can be an earthy clay like red colour Some can even display rainbow colours Kidney Ore Kidney Ore is a colloquial name given to botryoidal Hematite as sometimes it has a similar appearance to a Kidney Rainbow Hematite Rainbow Hematite can be a little confusing
·The crystal system of hematite is hexagonal but crystals appear in a wide variety of forms Well crystallized forms also called specularite tend to develop as flat trigonal crystals Reniform kidney ore or botryoidal forms are common as dehydrited geothite and break down to fibers or splinters Oolitic and fossiliferous hematite is often
·The huge iron ore deposits of Brazil are also well known to collectors who prize the superb tabular hematite crystals from Brumado Novo Horizonte Itabiria Con Genar de Campo and Jaguarcu Bright lustrous platy crystals sometimes exceeding 5 across are found here Some crystals are pyramidal scalenohedral or rhombohedral
A term used to describe rounded aggregates of tabular crystals In these formations the arrangement of the crystals somewhat reminds of the petals in a rose blossom hence the name Kidney Ore A reniform kidney shaped or botryoidal variety of hematite The internal structure of the kidney shaped nodules is usually concentric and radiating
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