Colorado Mineral Society Patch

American Federation of
Mineralogical Societies

Rocky Mountain Federation of Mineralogical Societies

CMS Members Jeff Self and Donna Ware featured on Colorado Public Radio's “Colorado Matters”

CMS members Jeff Self and Donna Ware were featured in an interview on the “Colorado Matters” program on Colorado Public Radio. The recorded interview with Ryan Warner can be listened to online via the CPR website at the link below, along with a story and photos about them.

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A Visitor’s Guide to
Colorado Gemstones

On International Gem Society's
Website mentions the
Colorado Mineral Society

Click here to read

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COVID-19 Update: Please do not attend field trips, meetings or events if you are feelng ill or were exposed to someone who tested positive within 14 days of the trip. We will observe physical distancing on all CMS sanctioned events or trips.

Welcome to the Colorado Mineral Society

Celebrating our 88th Year!
1936 - 2024

Colorado Mineral Society
March 2024 Meeting
Friday, March 1st, 2024 at 7 PM

The meeting starts at 7:00pm at St. Paul's Episcopal Church at 9200 W. 10th Ave (10th and Garrison) in Lakewood (map). Dan Mira will be talking about the minerals of Romania (see abstract below).

There will be a raffle of 6 nice specimens at 8:30pm with $1 tickets (cash only) that benefit the CMS education program. We will also have a rock sale with some of the Craig Cowdery collection specimens, gems, and faceting material that was donated to the club this summer (cash, check, or credit card accepted). Visitors and guests are welcome to attend the March meeting and presentation.



Minerals of Romania, Maramures County - Dan Mira

Maramures (pronounced Maramuresh) is a Romanian county in northern Transilvania near the border with the modern Ukraine with a rich mining history. The first records and archeological finds prove mining activities existed in this region before Dacia (the country name before the Roman conquest) was conquered by the Romans. A lot of gold and silver artifacts showing the same characteristics as the ones discovered locally were discovered in other parts of Dacia, proving the quality of the artifacts crafted locally was known and appreciated in a wide area. Gold, silver, lead and zinc were commonly extracted from the area. Manganese and barium were also mentioned since the 1300s. High quality specimens from the area filled collections and European museums since late 19th century, however, the two world wars and the following 50 years of communist regime kept the specimens outside of the reach of collectors (especially in US). The mines that are most familiar to collectors are located in relatively small area around Baia Mare (the Maramures county seat): Cavnic, Baia Sprie, Baiut, Herja and Rosia Poieni. Most sought after specimens include rhodochrosite, barite, black-and-white calcite spheres and stibnite. Dan’s talk will describe the geology, history, minerals and the culture of this mining area.


Romania Mine Locations

European Map showing Romania


To attend field trips and join the Colorado Mineral Society
please go to the
New Membership and Fieldtrip Signup Page below
and create your account online

Click here for the user guide. ~ * ~ Click here for the Introduction to the new site.

2023 Past Field Trip List is below

You must be a member to attend any fieldtrips and you can join or renew at the link above.


Amber, CMS President

Updated 2023 Field Trip List*

2023 Filed Trip List

Note: The field trips will be posted on the CMS fieldtrip website throughout the summer and automated
email notifications will go out when new trips are added.
Yellow highlighted trips are for Juniors Only
*Updated 8/31/2023



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