Denver Gem and Mineral Guild - News!





Field Trips


Golden Diggers (Juniors)




News Letter

Cool Links

Contact Us


Calendar of Coming Events


Tues., Feb. 4, 10:30-11:30 a.m., USGS Rocky Mountain Science Seminar, Exploring the mechanics of our retreating Arctic coastline, Dr. Matt Thomas, U.S. Geological Survey.  Building 25 auditorium, Denver Federal Center, Lakewood CO.


Mon., Feb. 10, 11:30, Denver Mining Club weekly meeting, Martin Palkovic, Colorado Geological Survey, Cretaceous Sedimentary Bedrock and its Impact on Uranium Concentrations in Irrigation Return-Flows to the Arkansas River, Southeastern Colorado. Golden Corral Buffet & Grill, 3677 South Santa Fe Dr., Sheridan, CO (southwest side at Santa Fe Dr. & Hampden Ave.). All are welcome; purchase of lunch is required for entry; meeting runs from 11:30 to 1:00.


Tues., Feb. 11, 7:00 p.m., Western Museum of Mining & Industry, Colorado Springs, February Lecture Series, “Industrial Minerals All Around Us”, by David Abbott. “Industrial minerals are major components of most products we use on a daily basis: bricks & concrete, building stones, wallboard, glass, ceramics and sand paper. They are found in cleaning products like Soft Scrub, many cosmetics and even the table salt we eat!” The monthly lecture series is free to WMMI Members, $5.00 for guests. To RSVP to attend a lecture call 719-488-0880 or email


Feb. 13-16, 66th Annual Tucson Gem and Mineral Show, sponsored by the Tucson Gem and Mineral Society (TGMS), Tucson Convention Center, Tucson, AZ.  This is “the main show” in Tucson; many of the other, commercial shows, in the city are already open and have been for the past week or more.


Sun, Feb. 16, noonish, at the monthly FSS (Florissant Scientific Society) meeting, Jay Temple (geologist) and Jennifer Heiny (Garden of the Gods Visitors Center) will give a presentation “Behind the Scenes at Garden of the Gods”, followed perhaps by a short field trip.  Meeting place and exact time TBD. All are welcome to attend—the FSS has no formal membership, other than an email list of persons interested in geology. Contact Beth Simmons,, for details or to be put on the FSS mailing list.


Tues., Feb. 18, 10:30-11:30 a.m., USGS Rocky Mountain Science Seminar, Global metal resources; land of plenty or are we running out?, Dr. Simon Jowitt, University of Nevada, Las Vegas. 

Building 25 auditorium, Denver Federal Center, Lakewood CO.


Tues., Feb. 18, 3:00 p.m., Denver Museum of Nature and Science M. Ray Thomasson Earth Sciences Colloquium, Last gasp of the Cretaceous: Insights from North Dakota, Clint Boyd (North Dakota Geological Survey). The DMNS Earth Sciences Department has named its 2020 Colloquium series in honor M. Ray Thomasson, a longtime Earth Sciences volunteer at the museum. Link to the series schedule for the whole year:


Thurs., Feb. 20, 7:00 p.m., Petrologic evolution of Platoro magmatic system after the eruption of the Chiquito Peak Tuff, San Juan Volcanic Locus, Colorado, by Amy Gilmer, US Geological Survey.

Monthly meeting of the Colorado Scientific Society, Berthoud Hall Room 241, Colorado School of Mines campus, Golden; all are welcome; social time & refreshments at 6:30, meeting at 7:00.  See an abstract (and a map) on the Sci Soc website,


Fri.-Sat.-Sun., Feb. 28-Mar. 1, Denver Gem & Mineral Guild, Jewelry, Gem, and Mineral Show, Jefferson County Fair Grounds, 15200 W. 6th Ave., Golden, CO. Free parking & free admission; hours 10-6 Fri. & Sat., 10-5 Sun. See: and


Thurs., Mar. 12, 7:30 p.m., bimonthly meeting, Friends of Mineralogy, Colorado Chapter, featuring Scott Werschky, Reno, NV, mining geologist, mineral dealer (Miner’s Lunchbox, specializing in gold specimens and “investment quality mineral specimens”), and board member of the Rice Museum of Rocks and Minerals.  Presentation topic TBA. Berthoud Hall Room 108, Colorado School of Mines campus, Golden. See for more info when available.


Fri., Mar. 13, North Jeffco Gem & Mineral Club Silent Auction, APEX Community Center, 6842 Wadsworth Blvd., Arvada, setup at 5:30 p.m., auction begins at 6:45 p.m. All are welcome. For more info, Bill Jones, 303-503-6288, email .


Fri.-Sat.-Sun., Mar. 13-15, Fort Collins Gem & Mineral Show; at Thomas M. McKee Building, at The Ranch/Larimer County Fairgrounds, 5280 Arena Circle, Loveland, CO (I-25 exit 259); hours 4-8 Fri., 9-6 Sat., 10-5 Sun.; adult admission $4.  Sponsored by the Fort Collins Rockhounds Club.


Thurs., Mar. 19, 7:00 p.m., Colo. Sci. Soc. Monthly meeting,  2019 Colorado Avalanches: A case history of destruction in Hinsdale County, impacts to historic mining dams, and how snow avalanches may influence development of rock glaciers, by Jonathon Lovekin, Colorado Geological Survey. Berthoud Hall Room 241.


Fri.-Sat.-Sun., Apr. 10-12, Colorado Mineral and Fossil Spring Show, Crown Plaza Hotel - Convention Center, 15500 E 40th Ave., Denver, Colorado, 10-6 Fri. & Sat., 10-5 Sun., free parking & admission.


Thurs., Apr. 16, 5:30 p.m., Rise of the Mammals: Exceptional Continental Record of Biotic Recovery after the Cretaceous–Paleogene Mass Extinction (about the Corral Bluffs fossil mammal find), by Ian Miller and Tyler Lyson, Denver Museum of Nature and Science; at the CSS Annual Past Presidents’ Dinner, to be held at the Mount Vernon Canyon Club


Sat., May 16, noon-4 p.m., Silent Auction, sponsored by Colorado Chapter, Friends of Mineralogy. All are welcome; setup at 11, auction begins at noon, live auction at 1 p.m. At a new location: Wheat Ridge United Methodist Church, 7530 W. 38th Ave., Wheat Ridge (38th Ave. at Wadsworth Blvd.).


Sat., May 16, 2020 Symposium on Water and Energy, to be held in Ricketson Auditorium, Denver Museum of Nature and Science. Cosponsored by the Colorado Scientific Society, Denver Museum of Nature & Science, Center for the American West, and others. Details forthcoming!


Sun, May 17, noonish, for the monthly FSS (Florissant Scientific Society) meeting, Christine Siddoway (Colorado College) will give a talk on the Tava Sandstone (the geologically famous “sandstone injectite dikes of the Pikes Peak region”) followed by a short field trip. Osborne Center, University of Colorado at Colorado Springs. All are welcome to attend; contact Beth Simmons,, for details or to be put on the FSS mailing list.


Fri.-Sat.-Sun., June 12-14Pikes Peak Gem & Mineral Show, Norris-Penrose Event Center, 1045 Lower Gold Camp Road, Colorado Springs, CO 80905. Sponsored by the Colorado Springs Mineralogical Society. Hours: noon-7 pm Fri., 10-5 Sat, 10-4 Sun. Adult admission $5.


Thurs.-Sun., July 23-26, Fairplay Contin-Tail Gem, Mineral, and Jewelry Show, Fairplay River Park.


Thurs.-Sun., Aug. 6-9, Buena Vista Contin-Tail outdoor gem and mineral show, Buena Vista Rodeo Grounds.  Colorado’s longtime famous and best attended tent & tailgate rock swap and show.


Fri.-Sun., Aug. 14-16, Lake George Gem and Mineral Show, sponsored by the Lake George Gem and Mineral Club. Also taking place nearby “down the road” is the Woodland Park Rock, Gem and Jewelry Show, Aug. 13-16.


Fri.-Sun., Sept. 18-20, 53rd Annual Denver Gem and Mineral Show, at the Denver Mart.  2020 theme is “Fabulous Fluorite”.


Fri., Nov. 13, Colorado Science Conference for Professional Development, at the Denver Mart, 451 E 58th Ave., Denver.  See the conference website at



*          *          *          *          *          *          *          *          *          *          *          *          *         


For more lecture series during the year see:


Colorado Beer Talks (2nd Tuesday, 6-8 p.m.), Windy Saddle Café, 1110 Washington Avenue, Golden, “Golden’s grassroots version of TED talks, Expand your mind with a beer in your hand”,

Colorado Café Scientifique in Denver, monthly lectures on science topics held either at Blake Street Station or Brooklyn’s, Denver; open to the public, no charge other than refreshments you may choose to purchase; see .

Colorado Scientific Society (3rd Thursday, 7 p.m.), see . Meets at Shepherd of the Hills Church, 11500 W. 20th Ave., Lakewood CO, except when noted.

CU Geological Science Colloquium (Wednesdays, 4 p.m.) see

CSU Dept. of Geoscience Seminars (Fridays, 4 p.m.), see

Van Tuyl Lecture Series, Colorado School of Mines, (Thursdays, 4 p.m.):

Denver Mining Club (Mondays, 11:30), see .

Denver Museum of Nature and Science, Earth Science Colloquium series, 3:00-4:00 p.m., VIP Room unless noted, day of the week varies. Museum admission is not required; see

Denver Region Exploration Geologists Society (DREGS; 1st Monday, 7 p.m.),

Florissant Scientific Society (FSS); meets monthly in various Front Range locations for a lecture or field trip; meeting locations vary, normally on Sundays at noon; all interested persons are welcome to attend the meetings and trips; see for details and schedules.

Nerd Night Denver is a theater-style evening featuring usually 3 short (20-minute) TED-style talks on science or related topics; held more-or-less monthly at the Oriental Theater, 4335 W. 44th Ave., Denver; drinks are available; for ages 18+.  Admission is $6 online in advance, $10 at the door. See .

Rocky Mountain Map Society (RMMS; Denver Public Library, Gates Room, 3rd Tuesday, 5:30 p.m.),

Western Interior Paleontological Society (WIPS); beginning January 2019, WIPS will meet on the 1st Monday of the month, 7 p.m., at Lowry Conference Center, 1061 Akron Way, Denver. See .

Thanks to Peter J. Modreski for keeping us up to date!
To be added to his email list for upcoming events, send request to
pmodreski @