Lemon Quartz Gemstone & Information | Gemopedia by JTV | Gemopedia™
Named for its refreshing and invigorating yellow color, the strong citrus tones of this gem type are an unusual quality in the gemstone world. The radiant beauty of lemon quartz gems is dazzling, particularly when light dancing from its facets and it truly comes to life. The lemon color is most likely caused by iron breaching the color centers of the stone. The difference between citrine and lemon quartz is in their saturation and color tone. Because of their color similarity, many gem dealers do not even separate the two and use the name citrine for all yellow quartz.
Lemon-quartz classificationCommonNameLemon QuartzSpeciesQuartzVarietyLemon QuartzColorsBright YellowAlternateNamesOro Verde QuartzGemstoneGroupsKeySeparationsrefractive index, birefringence, optic character and optic figure. Careful observation that reveals Brazil-law twinning separates lemon quartz from scapolite with similar properties.ClassificationCommentsThe lemon color is caused by irradiation.
Lemon-quartz chemistry & crystallographyChemicalNamesilicon dioxide (aka silica)ChemicalFormulaSiO2SynthesisCrystalSystemTrigonalChemistryClassificationSilicateNatureNaturalCrystallinityCrystallineChemistryComments
Lemon-quartz optical propertiesTransparencyTransparent - TranslucentDispersionStrength: weak fire Value: 0.013OpticalCommentsRefractiveIndex1.544-1.553
Tolerance:very constantBirefringence0.009OpticCharacterUniaxialOpticSignPositivePolariscopeReactionDoubly Refractive (DR)FluorescenceSWUV: Inert
LWUV: InertCCFReactionPleochroismDichroic, unobservable or weak, varying shades of body color
Lemon-quartz characteristic physical propertiesHardness7CharacteristicCommentsStreakWhiteSpecificGravity2.64-2.69 Typical:2.66ToughnessGoodInclusionsLemon quartz is a type I clarity stone. Color zoning often present in lemon quartz in the form of "tiger stripes" or "zebra stripes". Stones my contain crystals, negative crystals, liquid inclusions, two-phase inclusions and partially healed fractures.LusterVitreousStabilityGoodFractureConchoidalCleavageNone