Helenite Gemstone & Information | Gemopedia by JTV | Gemopedia™
Also known as Mount St. Helens stone, helenite is a man-made stone that originates from the ashes of the Washington State Mount St. Helens eruption in 1980. While the volcanic ash was being removed, it was discovered that it contained glass particles that turned a beautiful green color when heated. This glass is commonly made and fashioned into jewels that may be green, red or blue.
Green, Red, Blue
Helenite classificationCommonNameHeleniteSpeciesNAVarietyColorsGreen, Red, BlueAlternateNamesMount St. Helens Obsidian, Emerald Obsidianite(TM) And Ruby Obsidianite(TM)GemstoneGroupsKeySeparationsClassificationCommentsFirst created after the Mount St. Helens explosion when recovery workers heated volcanic ash with acetylene torches.
Helenite chemistry & crystallographyChemicalNamesilicaChemicalFormulaSynthesisCrystalSystemNAChemistryClassificationNatureSyntheticCrystallinityAmorphousChemistryComments
Helenite optical propertiesTransparencyTransparent - TranslucentDispersionOpticalCommentsRefractiveIndex1.49
Tolerance:(+0.020/-0.010)BirefringenceOpticCharacterNAOpticSignNAPolariscopeReactionSingly Refractive (SR) With ADRFluorescenceSWUV:
Helenite characteristic physical propertiesHardness5-5.5CharacteristicCommentsStreakSpecificGravity2.32-2.4 Typical:2.36ToughnessVariesInclusionsHelenite might have air bubbles.LusterVitreousStabilityFractureConchoidalCleavageNone