Ruby (Lead-glass filled) Gemstone & Information | Gemopedia by JTV | Gemopedia™

Ruby (Lead-glass filled)

Lead glass filled rubies have been filled through a process similar to "infilling" using lead glass. Performed at lower temperatures, this is a less durable treatment and should be treated gently, avoiding household and professional chemicals. This treatment improves clarity, color, durability, and may add weight through the filling of voids and fissures.

Colors

Orangy Red, Red, Purplish Red

  • Ruby-lead-glass-filled classification

    CommonName
    Ruby (Lead-glass filled)
    Species
    Corundum
    Variety
    Lead Glass Filled Rubies
    Colors
    Orangy Red, Red, Purplish Red
    AlternateNames
    Mahaleo Ruby
    GemstoneGroups
    KeySeparations
    Magnification and RI, birefringence, pleochroism
    ClassificationComments
    Lead glass will be damaged with jeweler's torch or exposure to chemicals. Specific gravity can be increased to to the amount of lead glass in the stone.
  • Ruby-lead-glass-filled chemistry & crystallography

    ChemicalName
    aluminum oxide
    ChemicalFormula
    Al2O3
    Synthesis
    CrystalSystem
    Trigonal
    ChemistryClassification
    Oxide
    Nature
    Natural
    Crystallinity
    Crystalline
    ChemistryComments
  • Ruby-lead-glass-filled optical properties

    Transparency
    Transparent - Opaque
    Dispersion
    Strength: moderate fire Value: 0.018
    OpticalComments
    RefractiveIndex
    1.762-1.77
    Tolerance:(+0.009/-0.005)
    Birefringence
    0.008-0.01
    OpticCharacter
    Uniaxial
    OpticSign
    Negative
    PolariscopeReaction
    Doubly Refractive (DR)
    Fluorescence
    SWUV:
    LWUV:
    CCFReaction
    Pleochroism
    Dichroic, strong orangy red and purplish red
  • Ruby-lead-glass-filled characteristic physical properties

    Hardness
    9
    CharacteristicComments
    Streak
    White
    SpecificGravity
    3.95-4.1 Typical:4
    Toughness
    Poor
    Inclusions
    Lead glass filled rubies will show gas bubble sand color concentrations in fissures. Blue flash colors from the lead glass filling might be seen when viewing stone in dark field lighting.
    Luster
    SubAdamantine
    Stability
    Poor
    Fracture
    Conchoidal
    Cleavage
    None