Roman Glass

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Roman Glass is actual glass that has been buried for 2,000-years in mineral-rich soil. Archeological sites located near Jerusalem serve as the main source of Roman glass, notably because Israel once served as a major glass-making center. A thin layer of patina naturally forms on the glass as minerals in the soil react with the glass. The natural process of oxidation creates the various shades of blues and greens on the surface. As the coloration depends on the mineral condition to which the glass is exposed, each piece is unique.

Roman Glass Polished
Roman Glass Classification
Common Name Roman Glass
Species Glass
Roman Glass Optical Properties
Transparency Opaque-Transparent
Dispersion Strength: Moderate if Contains Lead Value: 0.009
Refractive Index Over The Limit 1.470-1.700 Tolerance: Can go OTL
Optic Character NA
Optic Sign NA
Polariscope Reaction Aggregate (AGG), Anomalous Double Refraction (ADR)
Fluorescence SWUV: Variable
LWUV: Variable
Pleochroism None
Roman Glass Characteristic Physical Properties
Hardness 5-6
Toughness Poor
Inclusions Air bubbles, flow lines
Luster Vitreous, Subvitreous
Fracture Conchoidal, Granular, Splintery
Cleavage None
Roman Glass Chemistry & Crystallography
Chemical Name Silica
Crystal System NA

Roman Glass Colors

  • Bi-color Roman Glass Bi-color
  • White Roman Glass White
  • Red Roman Glass Red
  • Purple Roman Glass Purple
  • Pink Roman Glass Pink
  • Orange Roman Glass Orange
  • Multi-color Roman Glass Multi-color
  • Green Roman Glass Green
  • Gray Roman Glass Gray
  • Colorless Roman Glass Colorless
  • Brown Roman Glass Brown
  • Blue Roman Glass Blue
  • Black Roman Glass Black

Countries of Origin


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Tim Matthews


Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.