Posts Tagged ‘John Koivula’

Imitation Gemstones– Buyer Beware

Saturday, November 9th, 2013

A client brought these three stones to our shop looking to sell them. She had purchased the stones while traveling and was under the impression the two 30 ct. greenish blue ones were aquamarines and the peachy pink stone was morganite. At Mardon, as gemologists, we always buy gems very carefully and only when we […]

Madonna in Opal

Wednesday, October 21st, 2009

A jeweler in Cabo San Lucas sold this Mexican matrix opal pendant to my client.

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