Welcome to The Hidden Gem, a family-owned rock and mineral shop and lapidary studio in Penryn, California, near Loomis, Rocklin, Roseville and Auburn. Explore natural crystals, minerals, fossils, lapidary rough, collector specimens and treasures from the earth. Learn lapidary, have your own rocks cut or polished, identify a mystery stone, or come discover something extraordinary. Shop our larger online collection nationwide at The Hidden Bazaar.
2210 Taylor Road, Suite A
Penryn, CA 95663
We're a family-run rock shop with flexible hours. We may be out cutting rocks, delivering orders or exploring our claims, often just 5–15 minutes away.
When in doubt, call us. We'll help you plan your visit.
Whether you are searching for a crystal shop near Roseville, learning to cut rocks, or looking for a collector specimen, we can help you find your next discovery.
Browse crystals, fossils, minerals, rough stone and collector specimens through our flagship online store, The Hidden Bazaar.
Shop The Hidden Bazaar → 02 / LEARNLearn stone identification, cutting, shaping, sanding and polishing through guided lessons.
Explore classes → 03 / CREATEProfessional lapidary services for your own stones, minerals, slabs and collecting finds.
Explore lapidary services → 04 / IDENTIFYFound an unusual rock or mineral? Bring your specimen and locality details for guidance.
Get Rock ID help →The Hidden Gem is our family-run brick-and-mortar rock shop and lapidary studio in Penryn, California. The Hidden Bazaar is our larger branded online store, where collectors across the United States can discover carefully selected natural minerals, crystals, fossils, rare specimens, lapidary rough and one-of-a-kind treasures.
Can't make it to Penryn? The adventure continues online. Explore the collection and have your discoveries shipped directly to your door.
The Hidden Gem Rock Shop in Penryn is built around the thrill of discovery. Browse minerals, natural crystals, fossils, lapidary rough and unusual collector specimens. Our inventory constantly changes as new collections, field finds and interesting treasures arrive.
Whether you're an experienced rockhound or simply curious about geology, our family shop offers a personal experience you won't find at an ordinary retail store.
Discover lapidary at The Hidden Gem in Penryn. Our educational classes introduce stone selection, equipment, safety, rock cutting, shaping and polishing. Beginners can develop their skills through guided hands-on instruction.
Our family-operated studio offers professional lapidary services, rock identification, metal detecting recovery, private shopping and educational experiences throughout the greater Sacramento region.
Professional cutting, polishing, cabochon work, custom finishing and stone drilling. Bring your own rocks and let us help uncover their beauty.
Explore Lapidary Services →Found an interesting rock? We help customers explore possible mineral identification, geological characteristics and locality information.
Get Rock ID Help →Lost a ring, jewelry, keys or another important metal item? Ask about professional metal detecting recovery services in the Sacramento and Placer County region.
Explore Recovery Services →We review select mineral collections, fossils, estate material, lapidary rough and unusual rockhound finds.
Buy, Sell or Trade →Discover a growing local community of collectors, families, geology enthusiasts and lapidary artists.
Join Our Community →Schedule dedicated time at our Penryn rock shop for personal attention, collector guidance and an unhurried shopping experience.
Book Private Shopping →From statement minerals and fossils to lapidary rough waiting for the saw, these are examples of the material we love sharing with our community. Visit The Hidden Bazaar for online shopping.
Part rock shop. Part lapidary studio. Part classroom. Part treasure hunt. The Hidden Gem is a welcoming space for collectors, families, makers, rockhounds and curious first-time visitors.
Our goal is to share the wonder of natural history, geology and the incredible stories hidden inside the earth.
The Hidden Gem is located at 2210 Taylor Road, Suite A, Penryn, California 95663. We welcome visitors from throughout Placer County and the greater Sacramento region.
If you are searching for a rock and mineral shop near Loomis, crystals near Roseville, fossils near Rocklin, or rock cutting and polishing near Auburn, we invite you to discover our family-owned shop.
Visit us at 2210 Taylor Road, Suite A, Penryn, CA 95663, conveniently located near Loomis, Rocklin, Roseville and Auburn in Placer County.
The Hidden Gem in nearby Penryn offers natural crystals, rocks, minerals, fossils, collector specimens and lapidary services. We also welcome visitors from Rocklin, Loomis, Auburn and Sacramento.
Yes. We offer professional rock cutting, flat-face polishing, custom finishes, cabochon work, stone drilling and other lapidary services by arrangement.
Yes. Our lapidary education includes introductory instruction and hands-on experience with stone shaping, cutting, sanding and polishing. Book through our online scheduling system.
Yes. Bring your specimen when possible, along with clear photographs and information about where it was found. We can help guide you through possible identification.
Absolutely. Our flagship online store, The Hidden Bazaar, offers natural minerals, crystals, fossils and collectible specimens with nationwide ordering. Visit https://thehiddenbazaar.com/.
Tuesday and Thursday: 9 AM to 5 PM. Saturday: 9 AM to 1 PM. Monday, Wednesday and Sunday are by appointment only. Friday hours vary, so please call before visiting.
We recommend calling ahead even during regular business hours. Our family sometimes works offsite on lapidary jobs, deliveries, post office runs and rockhounding activities. We are often just 5 to 15 minutes away. Appointments are available for personalized visits.
Our shop schedule is flexible. We may be nearby working on lapidary projects, deliveries or rockhounding. Check our hours above , or book an appointment.
When in doubt, call us.
