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Hematite (/ ˈ h iː m ə ˌ t aɪ t, ˈ h ɛ m ə-/), also spelled as haematite, is a common iron oxide compound with the formula, Fe 2 O 3 and is widely found in rocks and soils. [6] Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of Fe 2 O 3. It has the same crystal structure as corundum ...
Martian spherules (also known as hematite spherules, blueberries, & Martian blueberries) are small spherules (roughly spherical pebbles) that are rich in an iron oxide (grey hematite, α-Fe 2 O 3) and are found at Meridiani Planum (a large plain on Mars) in exceedingly large numbers.
Hematine ring. Hematine (also magnetic hematite, hemalyke or hemalike) is an artificial magnetic material. [1] Hematine is widely used in jewelry. [citation needed]Although it is claimed by many that it is made from ground hematite or iron oxide mixed with a resin, analysis (of one object) has demonstrated it to be an entirely artificial compound, a barium-strontium ferrite.
A Carved Gold Dust Faturan Prayer Bead Strand made from North African Tribal Beads. In the bead trade, "Faturan" is thought to be a mixture of natural amber shavings with other materials, and is described as having been invented in the Middle East in the 18th or 19th century, however, there is some dispute over this within the trade.
Hematite group Corundum Al 2 O 3; Hematite Fe 2 O 3; Ilmenite FeTiO 3; XO 2 form Rutile group Rutile TiO 2; Pyrolusite MnO 2; Cassiterite SnO 2; Baddeleyite ZrO 2; Uraninite UO 2; Thorianite ThO 2; XY 2 O 4 form Spinel group Spinel MgAl 2 O 4; Gahnite ZnAl 2 O 4; Magnetite Fe 3 O 4 (Fe 2+ Fe 3+ 2 O 4) Franklinite (Zn,Fe,Mn)(Fe,Mn) 2 O 4 ...
Maghemite (Fe 2 O 3, γ-Fe 2 O 3) is a member of the family of iron oxides.It has the same formula as hematite, but the same spinel ferrite structure as magnetite (Fe 3 O 4) and is also ferrimagnetic.
A rough specimen of bloodstone. Heliotropes (from Ancient Greek ἥλιος (hḗlios) 'sun' and τρέπειν (trépein) 'to turn') (also called ematille, Indian bloodstones, or simply bloodstones) are aggregate minerals, and cryptocrystalline mixture of quartz that occurs mostly as jasper or sometimes as chalcedony (translucent).
Ornaments from the past, bead studies after Beck: a book on glass and semiprecious stone beads in history and archaeology for archaeologists, jewellery historians and collectors. Bead Study Trust. pp. 108– 114. ISBN 9789749116593. OCLC 52696051. S2CID 190916548. Davison, Claire C. (September 1972).