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Tag Archives: AGTA

Imitation Gemstones– Buyer Beware

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 […]

Rainbow Garnets in White Gold- A Bracelet to Die For

Rainbow gem suites are quite popular– we see them assembled from all the colors of sapphire or with various colored gems that will make a full spectrum of color, but rarely featuring garnet. Our unique custom bracelet of rainbow garnets was made to order for a very happy client as her 40th anniversary gift. Since many […]

Who can call himself a jewelry appraiser?

This headline caught my eye in a recent email— the answer to this trick question is anyone! A newsletter by an insurance industry organization highlighted the fact that there are no federal or other governmental bodies setting qualifications for who may be a jeweler or a jewelry appraiser. A study by a related group also […]

Sapphires Illustrate the Limits of Perception

These two  sapphires are both from the island of Sri Lanka, both are heat enhanced, both are from the same vendor, both weigh about the same. Here’s another photograph, same stones, same photographer (myself), same camera, same photo stage, similar macro lens, slightly different lighting. Can you guess which one costs more?