Gem and Mineral Collection

Hello and thanks for visiting our web site! Our names are Richard & Cheryl Sittinger, and we have been displaying amazing minerals, tumbled stones, gemstones, and beads at gem & mineral shows since 1995! Our shows are primarily in California where we live, plus the two biggest shows of the year, in Tucson every January/February, and in Denver every September.

Please come and visit us at the show nearest to you and see our amazing selection of treasures from the earth, or contact us if there is something specific you are looking for.

Show Calendar

Tucson Private Wholesale Show

Wholesale Only

Tentative Dates

January 24-February 6

Contact us for show location, hours, exact dates

Castro Valley Jewelry, Gem, & Mineral Show

Friday through Sunday March 3, 4, 5, 2023

Friday and Saturday 10AM to 6PM, Sunday 10AM to 5PM

San Jose Gem & Mineral Show


Saturday and Sunday March 18 and 19, 2023

10AM to 5PM both days



richard at wonderworksminerals dot com


805-927-2223 Office

Send a Message Right Now!

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If you’re not already following us on Instagram, maybe it’s time to start. We bring gorgeous mineral and jewelry inspiration to daydreamers, storytellers, and collectors.