Limestone Gemstone & Information | Gemopedia by JTV | Gemopedia™
Limestone is composed mainly of calcite and occurs in thick extensive, multiple layers. It is formed in shallow seas from a combination of calcium carbonate or the accumulation of shells and skeletons of calcareous marine organisms. Limestone is abundant and is very important commercially as it has a number of different uses as a building stone, cement and as a raw material in the glass manufacturing process. Limestone that is recrystallized under heat and pressure becomes marble.
White, Gray, Pink
Limestone classificationCommonNameLimestoneSpeciesNAVarietyColorsWhite, Gray, PinkAlternateNamesGemstoneGroupsKeySeparationsClassificationCommentsLimestone is a sedimentary rock formed mostly from the skeletal remains of marine organisms. Due to impurities limestone can have a banded appearance. It is not uncommon for limestone to contain fossil material.
Limestone chemistry & crystallographyChemicalNameChemicalFormulacalcite, aragonite, dolomite, siderite, quartz and pyriteSynthesisCrystalSystemNAChemistryClassificationRockNatureNaturalCrystallinityAggregateChemistryComments
Limestone optical propertiesTransparencyOpaqueDispersionOpticalCommentsRefractiveIndexBirefringenceOpticCharacterOpticSignPolariscopeReactionFluorescenceSWUV:
Limestone characteristic physical propertiesHardnessCharacteristicCommentsStreakSpecificGravityToughnessInclusionsLusterDullStabilityFractureCleavageNone