What it is

The St. Louis Mineral & Gem Society (SLMGS) is a rock, mineral and lapidary club in St. Louis, Missouri. Its home page says it is “a non-profit club established in 1951 to help promote the hobby and knowledge of the Earth Sciences and Lapidary Arts within its membership and in the community.”

Who it’s for

Mineral collectors, rockhounds, gem and lapidary hobbyists and families in the St. Louis area who want a monthly speaker meeting, member field trips to mines and collecting sites, and a kids’ program. The club says guests are always welcome at meetings.

Why it’s listed

It’s a first-party club website that states its meeting day, time and place, its dues, its newsletter, its youth program and its annual show. This listing covers the club only. It is not a store and not a school.

Official URL

https://stlrockclub.com/home

Show: https://stlrockclub.com/show

Pebble Pups (kids): https://stlrockclub.com/pebble-pups-school-talks-and-science-fair

(First-party site checked 2026-10-19. Every cited URL returned HTTP 200 to curl with a Chrome user agent.)

Location

Meetings are held in Scott Rudolph Hall (the Earth and Planetary Sciences building), room 203, on Washington University’s Danforth Campus, on Hoyt Drive in St. Louis, MO. The club says to park in the underground garage off Hoyt Drive or Wrighton Way (take a ticket at entry; parking is free after 5 p.m.) and not to use the permit lot across Hoyt Drive. The site gives no mailing address.

This is a club. It is not a store and not a school.

Notes

Meetings: first Friday of each month, September through May, at 7:30 p.m. The next meeting posted is Friday, November 6, 2026, at 7:30 p.m. In June and December the club holds a summer picnic and a Christmas party instead of a formal meeting. The club says to check its Facebook page for changes.
Dues (yearly): single adult $15, family $20, junior (ages 10–17) $5, junior without the newsletter $3. Applications are by email. There is no online form or payment.
Member benefits: field-trip privileges (field trips are for members only), the monthly Rock Lore newsletter and a members-only Facebook group for trip and event notices.
Pebble Pups: a hands-on earth-science program for kids 12 and younger that meets next door during the business part of each meeting.
Show: the Show page says the annual St. Louis Mineral & Gem Society Show is “coming in November 2026.” No date or venue is printed on the page as text, so check the club’s site or Facebook page before going.
Lapidary caveat: the club’s stated purpose includes the lapidary arts, but the site does not describe a club lapidary shop or cutting classes.
Local collecting tip from the club: the Club News page describes the Mississippi River gravel bar near the old Chain of Rocks Bridge (Chouteau Island Fishing Area), exposed when the river is below 10 feet at the St. Louis gauge.
Photo: the image on the club’s home page (faceted gemstones, resized to 1200 × 798 from the 1800 × 1197 original). It is a photo, not a logo. The site has no logo file.
Missouri had no listings before this one.
Not affiliated with Lapidary Plaza. No form, payment or contact was used.

FAQ

Q: When does the St. Louis Mineral & Gem Society meet?
A: At 7:30 p.m. on the first Friday of each month, September through May, in room 203 of Scott Rudolph Hall on Washington University’s Danforth Campus. The next posted meeting is Friday, November 6, 2026.

Q: How much does membership cost?
A: $15 a year for a single adult, $20 for a family and $5 for a junior aged 10–17. Email the club for an application.

Q: Can I attend before joining?
A: Yes. The club says guests are always welcome at meetings.

Q: Does the club run field trips?
A: Yes, to local and out-of-state mines and collecting areas, but field trips are for members only.

Q: Is there something for kids?
A: Yes. Pebble Pups, for kids 12 and younger, meets next door during the business part of each meeting.