Moldavite Gemstone & Information | Gemopedia by JTV | Gemopedia™
Considered a blend of heaven and earth, tektites are fragments of natural glass formed from meteorite impacts with our planet. Tektites are assigned names based on their location. Thus, moldavite, named after the Moldau river in the Czech Republic, is found in that country. The intense pressure and temperatures present during its formation preserve tiny gaseous bubbles in many moldavite gems.
Medium To Dark Yellowish To Grayish Green
Moldavite classificationCommonNameMoldaviteSpeciesTektiteVarietyMoldaviteColorsMedium To Dark Yellowish To Grayish GreenAlternateNamesBouteille StoneGemstoneGroupsKeySeparationsrefractive index, SR nature, magnification, and specific gravityClassificationCommentsMoldavite is a type of natural glass. In some classification schemes, moldavite is considered a species without reference to tektite. Tektite is a general term used for natural glasses formed by meteoric impacts. Misnomers: Bohemian chrysolite, false chrysolite, glass chrysolite, glass metorite, pseudochrysolite
Moldavite chemistry & crystallographyChemicalNamesilicaChemicalFormulaSiO2 (+A2O3)SynthesisCrystalSystemNAChemistryClassificationMineraloidNatureNaturalCrystallinityNon-CrystallineChemistryComments
Moldavite optical propertiesTransparencyTransparent - TranslucentDispersionOpticalCommentsRefractiveIndex1.49-1.49
Tolerance:(+0.020/-0.010)Birefringence0-0OpticCharacterNAOpticSignNAPolariscopeReactionSingly Refractive (SR) With ADRFluorescenceSWUV: Inert
Moldavite characteristic physical propertiesHardness5-5.5CharacteristicCommentsStreakSpecificGravity2.32-2.4 Range:+/-0.04 Typical:2.36ToughnessVariesInclusionsMoldavite often has round and elongated gas bubbles, flow lines and a roiled, cloudy or turbid appearance.LusterVitreousStabilityFractureConchoidalCleavageNone