Category Archives: Meeting Archives

The Smithsonian Gems – Presented by Dr. Jeffrey E. Post

Dr. Jeffrey E. Post, provided a lively discussion on the The National Gem Collection. The history, benefactors, gems and jewelry were all fully described in the presentation as well as in the book: “The National Gem Collection” by Smithsonian Institution and … Continue reading

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GIA Updates

On Sept. 19, 2017, Kate Donovan, GIA Global Alumni Relations Manager, provided an update on GIA global initiatives, education, laboratory offerings, research, resources and instruments. Kate reviewed GIA’s current alumni benefits and the many programs available to support our efforts. GIA … Continue reading

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The Latest on Synthetic Diamonds | Dr. James Shigley | GIA at JCK

DCGIA thanks GIA for sharing these very informative videos! Video #1 – Dr. Smith shares what he has learned from exceptional diamonds, such as the Cullinan and Koh-I-Noor, that formed beneath the surface of the Earth. Smith, the researcher who … Continue reading

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Museum Field Trip at Hillwood Museum

Thirty six (36) DCGIA members and guests enjoyed a tour of the “Spectacular Gems and Jewelry” which was Marjorie Merriweather Post’s jewel collection on display at Hillwood Museum in DC. The tour featured an introduction to the collection by Angie Dodson, Director … Continue reading

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Pearls, Questions and Answers by Teresa Tkacik, M.S.N., F.N.P.C.

Teresa provided a very informative history of pearls, how pearls are cultured, the characteristic of pearls, and Faux pearls, which included a hands on demonstration of how to evaluate pearls. Presentation copy Recommended reading: Tears of the Moon by Robert … Continue reading

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DCGIA 2017 Tucson Report

Thanks go out to all the speakers, members and guests who made this evening enjoyable and informative. Courtland Lee, DCGIA’s resident Geologist and Miner, was a vendor at the 2017 Tucson International Gem Show.  Courtland discussed the wonderful array of … Continue reading

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The Art of Gem Cutting by Thomas Trozzo

DCGIA Thanks Tom Trozzo for sharing a wealth of information and his award winning gemstones with our members and guests. Continue reading

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Gem, Lapidary and Mineral Society of Washington, DC. Auction

Sunday, October 30  http://www.glmsdc.org/ Preview & Artist’s Sale – Noon to 2 pm  –  LIVE Auction – 2 to 5 pm Auction Site:  Bethesda Woman’s Club, 5500 Sonoma Road,  Bethesda, MD 20817 Free parking at rear of building and on side streets.

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Treatments and Synthetics: A Visual Review by John Koivula

 John Koivula an Analytical Microscopist at the Gemological Institute of America shared a visual review of slides identifying common features for synthetic and treated rubies, sapphires, emeralds, diamonds, chrysoberyl, opal, spinel, quartz, jade, and corundum. The majority of characteristics seen … Continue reading

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The Magic of Alexandrite by Evan Caplan

Los Angeles gem dealer with a specialty for rare gemstones, Evan Caplan shared his passion for Alexandrite with the DCGIA Members. Alexandrite one of the birthstones for June, is a very rare color-change variety of the mineral chrysoberyl. Green in daylight and Red … Continue reading

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