Monthly Member Meetings

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TYPICAL MEETING AGENDA:

Held on second Tuesday of each Month Our Typical Agenda is as follows:

Start Time: 7:00 PM at the Clubhouse, 516 West Atlanta Street SE, Marietta, GA 30101

7:00 – 7:45 PM – Speaker or Presentation
7:45 – 8:30 PM – Monthly Business Meeting
8:30 PM – Door Prize Drawings, Silent Auction, Socializing and Refreshments

To get an idea of the types of programs that we typically have each month, take a look at some of the previous presentations.

May Meeting Program

The member meeting is typically held on the second Tuesday of every month. For May, the monthly meeting is on Tuesday, May 14th; we meet at the clubhouse located at 516 West Atlanta Street in Marietta, and we start at 7:00pm.

Dennis Worthington is the Treasurer of the Cobb County Gem & Mineral Society. He is going to talk to us about Slag, discussing the historical processes that create slag and uses for this byproduct.

Dennis was born and raised in Cedartown, GA. He grew up as a Boy Scout and was outdoors for most of his youth and got started in rocks while finding geodes in the hills and ridges north of Rome. Later he would work in the Army’s helicopter program. He remained in the Army for a total of 24 years, living and working in various places around the world. A friend got him back into rocks and lapidary work while in Idar Oberstein, Germany. In 2022, he stopped flying and spends his time with his wife, Marie, on various hobbies including lapidary work and rock collecting. They now live in Rockmart, GA.

We look forward to seeing you next month. We’ll have light refreshments and free door prizes!

AUCTION THIS MONTH:

On Tuesday, May 14th, the first item up for bid is an amazonite specimen (top), where one of the faces is polished; this is a variety of microcline, which is a type of feldspar mineral. Its color is attributed to the presence of lead and water within its structure. Although the name might suggest a connection to the Amazon River (perhaps because of its color), this gemstone is not found in this region; it is primarily mined in Brazil, Russia, Colorado, Virginia, Madagascar, and Namibia.

The second item is dolomite from Black Rock, Arkansas (middle); it is formed through a process called dolomitization, where calcium carbonate minerals (such as calcite) are replaced with magnesium carbonate minerals under certain conditions of temperature and pressure. This often occurs in sedimentary rocks like limestone and marble.

The final lot is fossilized coral from Tampa Bay, Florida (bottom), which started forming during the Pleistocene epoch, which lasted from about 2.6 million years ago to 12 thousand years ago. During this time, sea levels were different than they are today, and much of Florida was submerged underwater. Coral reefs thrived in these warm, shallow waters, building up over time.