Melo Pearl Gemstone & Information | Gemopedia by JTV | Gemopedia™
The melo pearl comes from the melo melo sea snail, a group of sea snails with scroll-like volute shells found along in the South China Sea. The melo pearl is a non-nacreous pearl with colors ranging from light tan to brown, but orange is the most sought-after color. Melo pearls are extremely rare, as no harvesting techniques exist.
Orange To Red-Orange
Melo-pearl classificationCommonNameMelo PearlSpeciesNAVarietyMelo PearlColorsOrange To Red-OrangeAlternateNamesMelo Melo PearlGemstoneGroupsKeySeparationsRI, birefringence blink, magnification and appearance.ClassificationCommentsUse birefringence blink method to obtain birefringence. Come from the Melo melo snail. Melo pearls are not considered true pearls. Melo pearls typically weigh less than conch pearls.
Melo-pearl chemistry & crystallographyChemicalNameCalcium carbonate, conchiolin and waterChemicalFormulaCaCO3 with H2O and other organic materialsSynthesisCrystalSystemNAChemistryClassificationCarbonateNatureNaturalCrystallinityAggregateChemistryComments
Melo-pearl optical propertiesTransparencyTranslucent - OpaqueDispersionOpticalCommentsRefractiveIndex1.53-1.685Birefringence0.155OpticCharacterOpticSignPolariscopeReactionAggregate (AGG)FluorescenceSWUV: Variable
Melo-pearl characteristic physical propertiesHardness2.5-4CharacteristicCommentsStreakSpecificGravity2.87-2.83 Typical:2.85ToughnessFairInclusionsMelo pearls have a flame like structure and does not have nacre but a porcelain like finish.LusterDullStabilityPoorFractureUnevenCleavageNone