Discover Northern California's Hidden Gem
Crystals, minerals, lapidary services, rock identification, metal detecting recovery, and buy • sell • trade.
What We Do
Crystals & Minerals
Shop collector minerals, crystals, display pieces, rough rock, gifts, and natural treasures.
Lapidary Services
Rock cutting, slabbing, polishing, cabochons, and display-face work for select stones.
Rock Identification
Bring your mystery rock, mineral, crystal, or field find and we’ll help guide you.
Buy • Sell • Trade
We review collections, estate minerals, bulk lots, slabs, jewelry, and rockhound finds.
A Real Local Treasure Room
The Hidden Gem Rock Shop is built for collectors, families, makers, metaphysical shoppers, lapidary artists, and curious first-timers.
Come in for a gift, a specimen, a rock identification, a stone cut, a polish, or simply to see what the earth has been quietly making beneath our feet.
Not a generic crystal shop. Not a warehouse. A family-owned shop where rocks still feel like discovery.
Explore Our Services
Lapidary Services
Rock cutting, slabbing, polishing, cabochons, and custom display-face work for select stones.
Explore LapidaryMetal Detecting Recovery
Lost a ring, keys, jewelry, tools, or another metal item? We help recover what matters.
Request SearchWholesale / Trade
Wholesale minerals, buy/sell/trade, consignment, and collection reviews.
Start HerePopular Reasons People Visit
“What Did I Find?”
Rock and mineral identification help for local finds, inherited specimens, and mystery stones.
Unique Gifts
Crystals, minerals, jewelry, display pieces, and unforgettable conversation starters.
Stone Cutting
Open geodes, reveal hidden patterns, polish display faces, and prepare lapidary material.
Sell A Collection
Have minerals, crystals, slabs, or estate pieces? Send us photos first for an initial review.
Rock Shop Near Roseville, Rocklin, Auburn & Sacramento
The Hidden Gem Rock Shop serves Penryn, Loomis, Roseville, Rocklin, Auburn, Lincoln, Granite Bay, Newcastle, Sacramento, and surrounding Placer County communities.
Looking for a crystal shop, mineral shop, lapidary service, rock identification, metal detecting recovery, or buy/sell/trade mineral shop near you? You found the little cave door.
Frequently Asked Questions
Where is The Hidden Gem Rock Shop located?
We are located at 2210 Taylor Road, Suite A, Penryn, CA 95663.
Do you identify rocks?
Yes. Bring the actual piece if possible, along with photos and information about where it was found.
Do you cut and polish rocks?
Yes. We offer select lapidary services including rock cutting, slabbing, polishing, display-face work, and cabochon services.
Do you buy mineral collections?
Yes. Call, text, or email photos first so we can review the collection before you bring it into the shop.
Do I need to call before visiting?
Yes, calling first is best. Our hours can be flexible and we may be cutting stones, collecting, or working off-site.
Visit The Hidden Gem Rock Shop
2210 Taylor Road, Suite A
Penryn, CA 95663
Call / Text: 916-250-7281
Email: hello@thehiddengemloomis.com
General Hours: Monday – Saturday • 10 AM – 6 PM
Closed Sunday
Please call before stopping by.
