Services Built Around Discovery.
From revealing what is hiding inside a stone to recovering something you thought was gone forever, The Hidden Gem brings together professional lapidary, education, identification, jewelry care, collecting services and one-of-a-kind experiences under one roof.
What can we help you uncover?
Bring us a field find, a favorite specimen, jewelry that needs refreshing, a mystery mineral, a collection looking for a new home, or the story of something important that disappeared.
Rock Cutting & Polishing
Professional cutting, flat-face polishing, Collector's Finish, custom cabochons, stone drilling and specialty lapidary work for suitable customer-supplied material.
Explore Lapidary Services →Classes & Studio Access
Learn the fundamentals of stone, tools and lapidary technique, then build toward hands-on cutting, shaping and polishing. Qualified students can continue with certified studio access.
Classes & Bench Access →Jewelry & Crystal Care
Jewelry Refresh, Revive and Restore services plus careful, mineral-appropriate cleaning for crystals, spheres, polished stones and treasured specimens.
View Care Services →Rock & Mineral Identification
Have a mystery rock, mineral or field find? Bring the specimen, clear photographs and locality information and we will help narrow down what you may have found.
Get Rock ID Help →Search & Recovery
Professional metal-detecting recovery for lost rings, jewelry, keys and other important metal items across suitable yards, parks, fields, beaches and shallow-water locations.
Search & Recovery →Buy • Sell • Trade
We review select mineral collections, estate material, rough, slabs, lapidary material and unusual rockhound finds for purchase, trade or wholesale opportunities.
Sell or Trade With Us →Private Shopping
Reserve dedicated time to explore The Hidden Gem at your own pace with personal assistance, unique inventory and a quieter, more focused treasure-hunting experience.
Reserve Private Shopping →Flat Rate Shipping
Need your treasures shipped? Eligible orders can use our predictable flat-rate shipping service with careful packaging for rocks, minerals, crystals and lapidary material.
Arrange Shipping →Bring us the story first.
Natural stone rarely fits neatly into a checkbox. If your specimen, project, collection or recovery situation is unusual, contact us before booking and we will help point you toward the right service.
Rock, lapidary and collector services near you.
The Hidden Gem Rock Shop is located at 2210 Taylor Road, Suite A in Penryn, California. We serve collectors, makers, rockhounds, families and curious first-timers throughout Placer County and the greater Sacramento region.
Come curious. Leave with a treasure.
The Hidden Gem Rock Shop