Hematite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Hematite

Hematite is a dark gray to black mineral known to various cultures throughout history. Babylonians, Egyptians, Greeks, and Romans were a few of the civilizations that made use of this mineral. Hematite derives its name from a Greek word for blood, an allusion to the reddish powder produced during the fashioning process due to the presence of iron.

Colors

Dark Gray To Black

  • Hematite classification

    CommonName
    Hematite
    Species
    Hematite
    Variety
    Colors
    Dark Gray To Black
    AlternateNames
    GemstoneGroups
    Hematite
    KeySeparations
    Appearance, fracture and SG. Hematite is only slightly magnetic whereas synthetic hematine is moderately magnetic.
    ClassificationComments
    Misnomers: black diamond, black pearl and Alaskan black diamond.
  • Hematite chemistry & crystallography

    ChemicalName
    iron oxide
    ChemicalFormula
    iron oxide
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Oxide
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Hematite optical properties

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    Over The Limit 2.94-3.22
    Tolerance:(-0.070)
    Birefringence
    0.28
    OpticCharacter
    OpticSign
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV: Inert
    LWUV: Inert
    CCFReaction
    Pleochroism
    None
  • Hematite characteristic physical properties

    Hardness
    5.5-6.5
    CharacteristicComments
    Streak
    Red-Brown
    SpecificGravity
    4.95-5.28 Typical:5.2
    Toughness
    Excellent
    Inclusions
    Hematite will have a reddish color in surface fractures. Intaglios will show engraver marks.
    Luster
    Metallic
    Stability
    Poor
    Fracture
    Splintery, Granular, Subconchodial
    Cleavage
    None