Visit The Hidden Gem Rock Shop in Penryn, California
Questions about rocks, minerals, lapidary, rock identification, collections or private shopping? Stop in during normal business hours, call or text us, or reserve a private after-hours shopping appointment when you want the treasure room to yourself.
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 →Come explore during regular hours.
General shopping hours are designed for easy drop-in visits. Calling before making a special trip is still smart if you need a specific service, consultation or item.
The Hidden Gem Rock Shop
Penryn, CA 95663
Call / Text: 916-250-7281
hello@thehiddengemloomis.com
Want The Hidden Gem all to yourself?
Normal business hours end at 2 PM, but the treasure hunt does not have to. Reserve a Private Shopping Experience for dedicated access after normal hours, more time to explore and personal help finding the right pieces.
It is ideal for collectors, rockhounds, families, gift shopping or anyone who prefers a quieter, more personal visit.
40-minute private appointment
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 instead of sending 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 after-hours 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?
No appointment is normally required during Monday–Saturday regular hours. For a special trip, specific service or consultation, calling first is recommended.
Can I shop after 2 PM?
Yes, by appointment. Private Shopping Experiences are designed for customers who want dedicated access after normal business hours.
How much is Private Shopping?
The current Setmore listing is free and reserves 40 minutes of private shopping time.
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.
Visit during the day or reserve the shop after hours.
Stop in Monday through Saturday from 9 AM–2 PM, or reserve a private appointment when you want more time, fewer distractions and the treasure room to yourself.
The Hidden Gem Rock Shop
2210 Taylor Road, Suite A • Penryn, CA 95663