Despite the fact that lead glass-filled rubies, also known as composite rubies, are nearly worthless (as described in my previous post), there are plenty of people who will try to sell you a composite ruby as the real thing. Some sellers would openly lie to you, others would conceal the truth (the latter happens intentionally as well as unintentionally – due to the seller’s lack of professionalism). So, here are a few things you should always pay due attention to….
What is a Lead Glass-Filled Ruby? Lead glass-filled rubies first appeared on the market in 2004. According to the Gemological Institute of America (GIA), “the GAAJ laboratory in Japan issued a lab alert about rubies they had seen that had large numbers of fractures filled with high-lead-content glass, which made them appear very transparent. Since then, large quantities of this material have reached international markets.” The starting material is of very low quality: opaque, industrial-grade stones, rather brownish than red….