One of the best stocked rock shops in Colorado and the Four Corners, we specialize in gem dino bone, rough and finished. We carry rough rock, slabs, cabs, minerals, specimens, and collector’s items. Often called a museum, many come here to browse, find that perfect gift, or pick up rock and cutting supplies.

Great Service

Known for our great service, you can trust us to locate parts, tools, and offer advice on rock cutting, polishing, and metalsmithing. From beginners to experts, we have you covered.

Huge Selection

We stock or have access to most everything that a person interested in lapidary work, silver or goldsmithing, panning, rock hunting, carving, or collecting might need.

The Southwest’s Largest Selection of Ancient Gem Bone

Dinosaur Bone & Gem Bone

We offer an amazing variety of rate and amazing museum quality specimens of gem grade dinosaur bone.

The Southwest’s Leading Lapidary Work & Rock Shop

 San Juan Gems offers the largest selection of gems, rock, and unique specimens for anyone interested in lapidary work, silver or goldsmithing, panning, rock hunting, carving, or collecting. 

Shop our large selection of rocks,
gems, tools & Lapidary supplies.

Celebrating 50 years in business in Cortez, Colorado!

We have a retail store stocked with a huge selection and an ever changing inventory of items in our online store

Our online rock shop & shopping cart is being added to continually.

We are also available by phone or email for ordering if you have questions or concerns about ordering online. 970-565-9854 OR visit our Contact page to fill out our contact form. We strive to return messages within 24 hours.

You can also regularly find us at gem and mineral shows and we welcome to introduce yourself if you attend. Our upcoming schedule of events is available on our Events page.

Online Shopping

Find amazing specimens and all the supplies you need online.

Helpful Support

Our experts are here to help with all of your lapidary questions.

Unique Rocks & Gems

The American Southwest is known for fascinating geology, gems & fossils.

Visit Our Rock Shop


11523 Hwy. 145
Cortez, Colorado USA 81321



Business Hours (MST):

Monday – Friday: 9:30 a.m. to 5:00 p.m.
Saturday: 9:30 a.m. to 2:00 pm.
Closed Sunday