Gabbro Gemstone & Information | Gemopedia by JTV | Gemopedia™

Gabbro

Gabbro is a rock that is made up of calcium rich plagioclase feldspar and pyroxene, usually augite. Gabbros are found in a variety of locations, and have even been discovered on the moon. The colors of gabbro are typically dark gray to black with a medium to coarse texture and it is a favored medium in architectural designs.

Colors

Black, Green

  • Gabbro classification

    CommonName
    Gabbro
    Species
    NA
    Variety
    Colors
    Black, Green
    AlternateNames
    GemstoneGroups
    KeySeparations
    Appearance
    ClassificationComments
    Gabbro is a igneous rock that is black or dark green in color. Gabbro is coarse grained and and chemically equivalent to basalt.
  • Gabbro chemistry & crystallography

    ChemicalName
    mixture of pyroxene, plagioclase, amphibole, olivine and rarely silica
    ChemicalFormula
    Synthesis
    CrystalSystem
    NA
    ChemistryClassification
    Rock
    Nature
    Natural
    Crystallinity
    Aggregate
    ChemistryComments
  • Gabbro optical properties

    Transparency
    Opaque
    Dispersion
    OpticalComments
    RefractiveIndex
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Gabbro characteristic physical properties

    Hardness
    CharacteristicComments
    Streak
    SpecificGravity
    Toughness
    Inclusions
    Coarse grained crystals that appear to be rod like in appearance.
    Luster
    Stability
    Fracture
    Cleavage
    None