Posts Tagged ‘AGS’

The Mardon Way- Fine Gems

Wednesday, May 17th, 2017

Mardon has developed its reputation as a fine jeweler by creating its own way of doing business. The Mardon Way is based on our passion for fine colored gemstones. Because we love the richly colored treasures that Mother Nature has created for us, we’re dedicated to setting these fine colored gemstones into beautifully made pieces […]

Padparadscha or Not- What’s in a Name?

Wednesday, September 3rd, 2014

One of the problems we encounter in the gem trade is misrepresentation to add value to gems. As aficionados of fine gemstones and as members of the American Gem Society and the American Gem Trade Association, we believe it’s important to conduct our business by a strict code of ethics and to protect our customers from fraud and false advertising. […]

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 […]

A New Member of the National Association of Jewelry Appraisers

Wednesday, June 20th, 2012

I’m proud to announce my membership with the prestigious National Association of Jewelry Appraisers (NAJA). NAJA is a dynamic organization that focuses on the development of professional jewelry appraising thru advanced professional education and training as well as promoting high ethical standards. Their mission dovetails well with our longstanding relationship with the Gemological Institute of […]

Who can call himself a jewelry appraiser?

Thursday, May 12th, 2011

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 […]

The Perils of Paraiba-Jewelers Tears #2

Thursday, September 23rd, 2010

This tale of woe illustrates some of the risks and challenges we jewelers face in our fascinating business. Last year, I had seen this lovely and large reddish purple tourmaline several times. Gem dealer Jack had tried mightily to tempt me with it, an unheated stone from the country of Mozambique in East Africa, an […]

Sapphires Illustrate the Wonder of Gems and the Limits of Perception

Wednesday, July 14th, 2010

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?

A Tale of Two Diamond Clients

Saturday, May 22nd, 2010

A couple of weeks ago, I did a gemological consultation for a young man who had purchased a diamond solitaire from a diamond merchant’s Ebay site.  He was able to win a diamond auction and wanted my opinion of the stone. I looked over the stone first before asking him about the price paid, the […]

Recertification Blues – Passing the American Gem Society Annual Exam

Sunday, December 14th, 2008

Every year in the fall, I receive the materials to prepare for my annual recertification exam.  Sigh!  All titleholders in the American Gem Society are required to pass an examination of skills and gemological knowledge annually.  The AGS hosts yearly conclaves around the USA, in which seminars and classes present the latest information on gemology […]

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