Visit The Hidden Gem Rock Shop in Penryn, California
Visit our family-owned rock and mineral shop in Penryn, California for minerals, crystals, fossils, rock identification and lapidary services. Our location and shop hours are listed immediately below. Please call before stopping by so we can be here to welcome you.
The Hidden Gem Rock Shop
Our shop hours
We have three regular walk-in days. Private appointments are available on other days. Friday hours vary.
Please call before stopping by. As a family-owned shop, we sometimes step away for larger lapidary jobs, order deliveries, post office runs, rockhounding expeditions or visits to our claims. When working nearby, we are often just 5–15 minutes from the shop.
Call or Text
Fastest for availability, unusual stones, urgent recovery questions or same-day visit questions.
916-250-7281 → 02 / EMAILEmail Us
Best for photos, collection details, wholesale inquiries and more involved questions.
Email The Hidden Gem → 03 / VISITGet Directions
Find us at 2210 Taylor Road, Suite A in Penryn, California.
Open Maps → 04 / BOOKReserve Time
Book lapidary services, certified bench access or your private shopping experience.
Open Setmore →Want The Hidden Gem all to yourself?
Book a private shopping appointment on our appointment-only days or outside regular walk-in hours, subject to availability. Enjoy dedicated time to explore and personalized help finding just the right piece.
It is ideal for collectors, rockhounds, families, gift shopping or anyone who prefers a quieter, more personal visit.
40-minute private appointment • Check booking for current terms
Your time. Your treasure hunt. The entire shop.
What can we help with?
A few details up front help us give you a useful answer without unnecessary messages back and forth through the mineral fog.
Rock Identification
Bring or send natural-light photos, approximate size and where the material was found.
Rock ID inquiry →Lapidary Services
Include dimensions, material if known, and whether you want cutting, polishing, a cabochon or drilling.
View lapidary services →Sell A Collection
Send full-lot photos, closeups of the best pieces, labels and any known collection history.
Sell / trade / consign →Search & Recovery
Tell us what was lost, when, where, and what the search area looks like.
Search & recovery →Classes & Bench Access
View available educational offerings, lapidary appointments and certified workshop access.
View Setmore →Private Shopping
Reserve dedicated time for a quieter, personal shopping experience.
Book private shopping →Visiting from Roseville, Rocklin, Auburn or Sacramento?
The Hidden Gem is located in Penryn, California and welcomes collectors, makers, families and rockhounds from across Placer County and the greater Sacramento region.
Do I need an appointment to shop?
Tuesday and Thursday (9 AM–5 PM) and Saturday (9 AM–1 PM) are our posted walk-in days. Monday, Wednesday and Sunday are by appointment only. Friday hours vary. A quick call before visiting is always best.
Can I visit on an appointment-only day?
Yes. Private visits can be arranged for Monday, Wednesday, Sunday or outside our regular hours, subject to availability.
How do I arrange private shopping?
Reserve through our booking page to view current availability and appointment terms, or call us at 916-250-7281.
Can I bring in a rock for identification?
Yes. Bring the actual piece when possible, natural-light photos and information about where it was found.
Should I bring a large collection without calling?
Please contact us first. Photos let us review the collection before you move heavy boxes or tubs.
Where do I book lapidary services?
Rock cutting, polishing, cabochons, drilling and available bench access can be booked through Setmore.
When in doubt, call us.
Our schedule is flexible, and sometimes we are working just minutes from the shop. Call or text 916-250-7281 before making the drive. We would love to welcome you!
The Hidden Gem Rock Shop
2210 Taylor Road, Suite A • Penryn, CA 95663