Indianapolis, Indiana · 48 annual shows and counting

Three hundred and forty million years, held in one hand.

A club for the study of geology, mineralogy and paleontology. We meet monthly in Indianapolis, we collect across Indiana, and we put what we find in front of the public once a year.

Become a member Attend a meeting

Next meeting

Sunday, 11 October

Program at 2:00, meeting at 3:00.
Eagle Branch, Indianapolis Public Library · 3905 Moller Road
Speaker: Dr. Tim Cope, DePauw University

Full calendar

The annual show

49th Greater Indianapolis

Gem, Mineral & Fossil Show · September 2027 [DATES TO CONFIRM]
Hancock County 4-H Fairgrounds, Greenfield
Four buildings, fifty dealers, free admission and parking

Show details and dealer information

From the collection

Photographed by club members

A complete sea lily crinoid fossil on a limestone slab, stem curving away from the calyx — Elegantocrinus hemisphaericus

Mississippian · Montgomery County, Indiana
Photograph by K. Armstrong

A small fossil crinoid calyx held between two fingertips, showing its plated dome — Crinoid calyx

Collected on a club field trip
Approximately 25 mm across

Two halves of a quartz geode opened in cupped hands at a collecting site — Quartz geode, opened

Found, split and photographed in the field
[LOCALITY TO CONFIRM]

The Tumbler

Monthly newsletter Archive

Sept 2026Show week: four buildings, fifty dealers, a very full Kid's Area Aug 2026Display cases, talking sheets and the last call for volunteers June 2026Zack and Katherine Brady on the geology of Scotland

Four club members standing behind a display table of Indiana fossils at an outreach event

Indiana outreach

We bring the state's fossils to people who have never held one.

Members set up displays of Indiana fossils and minerals at Geofest and at events around the state, and talk anyone through what they are looking at. We also carry litter out of the sites we collect from.

More about the club