Helenite Gemstone & Information | Gemopedia by JTV | Gemopedia™

Helenite

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.

Colors

Green, Red, Blue

  • Helenite classification

    CommonName
    Helenite
    Species
    NA
    Variety
    Colors
    Green, Red, Blue
    AlternateNames
    Mount St. Helens Obsidian, Emerald Obsidianite(TM) And Ruby Obsidianite(TM)
    GemstoneGroups
    KeySeparations
    ClassificationComments
    First created after the Mount St. Helens explosion when recovery workers heated volcanic ash with acetylene torches.
  • Helenite chemistry & crystallography

    ChemicalName
    silica
    ChemicalFormula
    Synthesis
    CrystalSystem
    NA
    ChemistryClassification
    Nature
    Synthetic
    Crystallinity
    Amorphous
    ChemistryComments
  • Helenite optical properties

    Transparency
    Transparent - Translucent
    Dispersion
    OpticalComments
    RefractiveIndex
    1.49
    Tolerance:(+0.020/-0.010)
    Birefringence
    OpticCharacter
    NA
    OpticSign
    NA
    PolariscopeReaction
    Singly Refractive (SR) With ADR
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    None
  • Helenite characteristic physical properties

    Hardness
    5-5.5
    CharacteristicComments
    Streak
    SpecificGravity
    2.32-2.4 Typical:2.36
    Toughness
    Varies
    Inclusions
    Helenite might have air bubbles.
    Luster
    Vitreous
    Stability
    Fracture
    Conchoidal
    Cleavage
    None