Moon Mountain Gems

We are Moon Mountain Gems, a true rock shop offering mineral and fossil specimens, rocks found locally, gear for field collecting, and rough rock, slabs and tools for lapidary work. We have the widest selection of minerals, fossils, and gems in Western Colorado. The Owner, Seth Cain, having entered the gem show circuit more than 8 years ago, spent numerous field trips over the years and having purchased many truckloads of rough rocks, has amassed a huge and varied pile. He continues adding to the inventory via mining, gem circuit sales and vending at such venues as the Quartzsite and Tucson shows, and about 5-8 Colorado gem shows a year for specialty items. Seth specializes in rough rock and professional diamond tools. Lapidary artists can find a huge assortment of rough lapidary rocks and slabs. Those favoring a faceting machine over a cabbing machine will find raw gemstones. Those who prefer to buy finished stones for hand-crafted or pre-made settings will find jewelry-making supplies and findings, along with cut and polished cabochons and other prepared stones ready to set or to wire-wrap.

At Moon Mountain Gems we do stock new and used machines including flat laps and tumblers. We carry affordable slabs and stones in the range of $1 to $150. We strive to offer something for every rock hound, new and old. Whether you visit our Rock Shop in Colorado or visit our booth at a Gem Show you will find bins of tumble-polished stones neatly sorted by color and type as well as mineral, crystal, and fossil specimens from around the world. In this age when the cost to enter the collecting arena veers on the astronomical, you will greatly appreciate a readily apparent emphasis on affordability. We have treasures from around the world and some mined locally in Colorado where our Rock Shop is located at 338 S. 2nd St. Grand Junction, Colorado. The Facebook Business Page can be found at We host Live Shows through Facebook and weekly auctions as well as ship worldwide. If you have any Questions please contact Seth Cain or Allison/Jiji Hamel at or through our Facebook business page. Thank you for visiting and we hope you have a great day.

Gem & Mineral Show Schedule:

Earth Day / Southwest Arbor Fest 2019

Saturday, April 27 from 12-5

Get your taste buds involved with our Annual Mac & Cheese Cook-Off competition, sample some amazing craft beer from local and regional breweries (21 and up), roam around visiting the arts and craft booths, enjoy live music, experience the amazing touch-a-truck, indulge in some delicious food, and have a memorable Saturday full of fun!

Location: Lincoln Park, Grand Junction, Colorado 81501

Moroccan Village Rock Shop Outdoor Gem & Mineral Show 2019

Friday, May 17th 10am-6pm

Saturday, May 18th 10am-6pm

Sunday, May 19th 10am-6pm

FREE EVENT!! Weekend after Mother's Day

Moroccan Village Rock Shop's Annual Gem, Mineral and Jewelry Show. Rare mineral dealers, Custom on-site jewelers, sidewalk sale, in-store sales. Free food.

Location: 338 S. 2nd St. Grand Junction, CO


Facebook Event Page Link


Pikes Peak Gem, Mineral and Jewelry Show 2019

Friday, May 31, 2019 12:00 PM to 7:00 PMSaturday, June 1, 2019 10:00 AM to 5:00 PMSunday, June 2, 2019 10:00 AM to 4:00 PM

Adults $5/ 3 Day Pass $8 Kids 12 and Under are Free

This year's featured mineral is fluorite. Show highlights include exhibits, auctions, kid's activities, and door prizes! We expect over 50 vendors specializing in Colorado gems and minerals, as well as gems and minerals from the US and around the world, sculptures, fossils, meteorites, crystals, jewelry and more!

Location: Norris Penrose Event Center Colorado Springs, CO

Fairplay Gem, Mineral & Jewelry Contin-Tail Show 2019

Colorado's Newest Outdoor Gem & Mineral Show

June 6-9th

Location: Fairplay River Park Event Site. City owned lot south of the river and 1/2 mile west of US-285 on Platte Drive.

Victor Gem & Mineral Show

Thursday, June 14 & 15th from 9am to 5pm

Sunday, June 16 from 10am to 4pm.

Location: Downtown historic Victor and is open and free to the public.

This 2019 annual Gem & Mineral Show sponsored by the Southern Teller County Focus Group (STCFG) in Victor, Colorado will be held June 14-16. downtown historic Victor and is open and free to the public. 

The show will include vendors from across the state selling Colorado dug minerals. Items for sale will include polished gems, hand-crafted jewelry, rough slabs, specimens, cabochons, geode breaking, Cripple Creek & Victor Mining District gold ore specimens, Cripple Creek turquoise, and more.

There will also be gold and gem panning at the Victor Lowell Thomas Museum.


More Info Click Here


Buena Vista, Colorado Contin-Tail Gem & Mineral Show

August 08/08/2017 - 08/11/20179:00 am - 5:00 pm

Location: Buena Vista, CO Rodeo Grounds

Colorado’s largest outdoor show.  Free Admission, Free Parking.   100+ dealers, gemstones, mineral specimens, rough, slabs, jewelry, beads, cabochons, fossils, tools, petrified wood. 


Click for More Info


Woodland Park Rock, Gem and Jewelry Show

Thurs – Sun, Aug. 16th-19th

Hours are 9:00am-5:00pm

Location: Woodland Park, CO. On Hwy 24 between Walmart and Burger King. 

Over 40 vendors with mineral specimens from all over the world. Many of the specimens are self collected. We also have faceted stones, with the faceter on site to talk to you about his craft if you are interested.

Gold, silver, crystals, cabochons, fossils, petrified wood and local minerals can all be found! We have a kids area and lots of free rock for kids. Many of our vendors are artists, creating beautiful custom jewelry that you can’t find anywhere else. You can also talk to them and have them create something just for you.

The beautiful Pike National Forest is right there with lots of free camping, or several wooded RV parks located right in Woodland Park, Colorado. There are also many motels close by in Manitou Springs CO. For those of you that like to gamble Cripple Creek is just up the road for fun evening entertainment!

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Denver Miners Co-op Gem & Mineral Show 2019


More info on this event coming soon!


8th Annual Miner’s Co-op Rock Gem & Mineral Show

January 2020

Dates and scheduling to be determined.

This information will be updated further into the year as we get closer to the show's opening date.

Location: 6901 N. Casa Grande Hwy Marana, AZ 85653

Rough Rock

  • Orange Honeycomb Calcite Cube
    Orange Honeycomb Calcite Cube
  • Tiffany Stone
    Tiffany Stone Tiffany Stone
  • Ruby in Zoisite
    Ruby in Zoisite Ruby in Zoisite
  • Rough Shattuckite
    Rough Shattuckite Rough Shattuckite
  • Rough Shattuckite
    Rough Shattuckite
  • Rough Selenite Lot
    Rough Selenite Lot

Lapidary Tools

  • Green dop wax – 1lb
    Green dop wax – 1lb
  • CabKing 8″ 110 volt
    CabKing 8″ 110 volt CabKing 8″ 110 volt
  • CabKing 6″ 110 volt
    CabKing 6″ 110 volt CabKing 6″ 110 volt
  • Diamond Powder Grit 10000
    Diamond Powder Grit 10000
  • Diamond Powder Grit 8000
    Diamond Powder Grit 8000
  • Diamond Powder Grit 6000
    Diamond Powder Grit 6000


  • Black Tourmaline
    Black Tourmaline
  • Blue Kyanite Lot
    Blue Kyanite Lot
  • Red Quartz
    Red Quartz
  • "Desert Rose" Gypsum
  • Moqui Marbles "Shaman Stones" Hematite Concretions (2pcs)
    Moqui Marbles
  • Spinel in Marble Matrix
    Spinel in Marble Matrix
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