Glass Filled Ruby

Devil or Friend? A look at its story in the marketplace, and how to detect it.

Somewhere around the year 2004 or 2005, slowly but surely, larger “rubies” started to enter the Thailand marketplaces in Chanthaburi and Bangkok.

For regular buyers it was obvious something was up. Any kind of ‘Sudden Appearance Syndrome’ in the market place heralds a new treatment.

“spider webs” of surface-reaching fissures that are indented, lower than the host-corundum and made of a poor quality “frit” of lower-luster lead-glass filling

zooming in we see

Manufacturing Process

Further Reading