Rock Cutting, Polishing & Lapidary Services in Penryn, CA
Bring us the stone you cannot stop wondering about. The Hidden Gem offers professional rock cutting, flat-face polishing, Collector’s Finish, custom cabochons and precision stone drilling for rockhounds, collectors and makers.
What do you want your stone to become?
Our website mirrors the core lapidary services available through the live Hidden Gem Setmore booking page.
Rock Cutting
Geodes, thunder eggs, minerals and suitable field finds up to 8 inches.
From $65Stone Polishing
Choose a flat-face polish or premium Collector’s Finish.
From $80Custom Cabochons
Calibrated jewelry stones or one-of-a-kind freeform shapes from suitable rough.
From $150Stone Drilling
Precision diamond drilling for pendants, jewelry and creative projects.
$85 per stoneProfessional cutting with the bench time built in.
Each standard rock-cutting booking includes the required one-hour bench minimum and one standard cut. Final approval is subject to inspection of the stone.
0–3 Inches
60-minute appointment
Over 3–6 Inches
60-minute appointment
Over 6–8 Inches
60-minute appointment
From saw face to display face.
Flat-face polishing works one cut face through progressive diamond stages. Collector’s Finish is the premium option for substantially more complete specimen finishing.
Collector’s Finish.
For specimens that deserve more than a single polished face. The Collector’s Finish works the piece more extensively through multiple diamond polishing stages.
Up to 3 Inches
4-hour booking
Up to 6 Inches
4-hour booking
Up to 8 Inches
4-hour booking
Turn your material into something made for you.
Customer-supplied material is evaluated for hardness, fractures, stability and the design you want to achieve.
Precision-shaped to standard jewelry dimensions with a smooth dome and progressive diamond polish.
A custom shape designed around the natural pattern, color and personality of your stone.
Water-cooled precision diamond drilling for suitable stones, jewelry and creative projects.
From field find to finished stone.
Natural stone writes its own plot twists. We inspect first, discuss expectations and get approval before adding extra bench time.
Choose
Book the service and size that best matches your project.
Inspect
We assess size, fractures, matrix, stability and positioning.
Confirm
Special handling or additional time is discussed before proceeding.
Reveal
Your stone is cut, polished, shaped or drilled according to the selected service.
Yes, that rock you found counts.
Field finds, geodes, thunder eggs and many common lapidary materials can be evaluated. Dense, stable material usually gives the best chance of a clean cut or finish.
Learn it. Practice it. Keep creating.
After completing The Hidden Gem’s required lapidary courses and demonstrating safe equipment operation, certified students can reserve equipped bench space for their own projects.
Rock cutting & polishing near Roseville, Rocklin and Auburn.
The Hidden Gem is located at 2210 Taylor Road, Suite A in Penryn, California, serving rockhounds, collectors and makers throughout Placer County and the greater Sacramento region.
Can you cut rocks I found myself?
Yes. Field finds, geodes, thunder eggs, minerals and other suitable stones can be evaluated for cutting. Final approval depends on condition and stability.
Does cutting include polishing?
No. Cutting and polishing are separate services. Rock-cutting appointments include the bench minimum and one standard cut.
What is the difference between Flat-Face Polish and Collector’s Finish?
A Flat-Face Polish works one face. Collector’s Finish is a substantially more involved premium service that works the specimen more extensively.
Can you make a cabochon from my rock?
Yes, when the material is suitable. Calibrated cabochons start at $150 and freeform cabochons start at $200.
Do I need an appointment?
Booking through Setmore is recommended so the correct amount of bench time is reserved for your project.
Bring us the rock.
Book online, or call first if the piece is unusual and you are not sure which service fits.
The Hidden Gem Rock Shop
2210 Taylor Road, Suite A • Penryn, CA 95663
Monday–Saturday • 9 AM–2 PM