Gabbro Gemstone & Information | Gemopedia by JTV | Gemopedia™
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.
Gabbro classificationCommonNameGabbroSpeciesNAVarietyColorsBlack, GreenAlternateNamesGemstoneGroupsKeySeparationsAppearanceClassificationCommentsGabbro is a igneous rock that is black or dark green in color. Gabbro is coarse grained and and chemically equivalent to basalt.
Gabbro chemistry & crystallographyChemicalNamemixture of pyroxene, plagioclase, amphibole, olivine and rarely silicaChemicalFormulaSynthesisCrystalSystemNAChemistryClassificationRockNatureNaturalCrystallinityAggregateChemistryComments
Gabbro optical propertiesTransparencyOpaqueDispersionOpticalCommentsRefractiveIndexBirefringenceOpticCharacterNAOpticSignNAPolariscopeReactionFluorescenceSWUV:
Gabbro characteristic physical propertiesHardnessCharacteristicCommentsStreakSpecificGravityToughnessInclusionsCoarse grained crystals that appear to be rod like in appearance.LusterStabilityFractureCleavageNone