6 to 8 million years ago, volcanic activity in Western Utah deposited an igneous rock called rhyolite. Trapped gases formed pockets in the rhyolite, which eventually became lined with chalcedony and quartz from groundwater. Most Dugway Geodes fluoresce a lime green color due to minute amounts of a secondary mineral that bonded with the quartz when it was growing. The fluorescence comes from uranium salts trapped in the Chalcedony. The level of uranium is so low though, that it is undetectable, and totally harmless.

32,000 to 14,000 years ago, Lake Bonneville covered most of Western Utah. The lakes wave motion activity eroded the rhyolite and actually moved the geodes several miles away to their current location near the town of Dugway in Juab County, Utah. They are called Dugway Geodes because that is the only place on earth these are found!

Located on the edge of the salt flats of the Dugway Proving Ground, these West Desert geode beds are one of Utah’s most popular rock collecting sites. Their convenient location near the gem collecting area of Topaz Mountain make them an excellent companion stop for a family trek to the Thomas Range. This property is controlled by the Bureau of Land Management (BLM) public lands. Active mining claims exist on some portions of the "geode area" so seek permission from the claim owners before collecting. For more information on BLM public lands under claim contact the House Range/Warm Springs BLM field office at (435) 743-3100.

Until recently, the best known free collecting claim was maintained by Loy Crapo of Delta, Utah. Since Loy’s passing, his family has taken over management of the site. To justify the excavation and insurance expenses of maintaining the site, visitors must now sign a liability waiver and submit a $30 fee per group to collect. In return, the Crapo family is constantly excavating new collecting pits in the clay to ensure visitors have constant access to fresh material.

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 8DG05205245

Polished Face Fluorescent Dugway Geode Half

$109.00

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Exceptional Large Cabinet Chalcedony Chamber Fluorescent Dugway Geode. The large swirling vug is like a cavern that is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light.

Measures 5.79 x 4 x 3.45 inches (14.7 x 10.4 x 8.7 cm) and weighs 42.6 oz or 2.66 lbs (1.208kg)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 21DG12201372

Polished Face Fluorescent Dugway Geode Half

$54.00

Exceptional Large Cabinet Chalcedony Fluorescent Dugway Geode. The vug is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is matt polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 5.5 x 4 x 1.3 inches (14.2 x 10.3 x 3.4 cm) and weighs 15.4 oz or 0.96 lbs (439g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 31DG12208101

Polished Face Fluorescent Dugway Geode Half

$29.00

Very Nice Chalcedony Fluorescent Dugway Geode. The vug is like a cavern lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light.

Measures 3.8 x 3.1 x 1.7 inches (9.7 x 8 x 4.3 cm) and weighs 13.1 oz or 0.82 lbs (372g)

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Polished Face Fluorescent Dugway Geode Half
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Dugway_Geode_23_4_ Polished Face Fluorescent Dugway Geode Half Dugway_Geode_23_3_
Item # 23DG12208373

Polished Face Fluorescent Dugway Geode Half

$76.00

Exceptional Large Cabinet Chalcedony Fluorescent Dugway Geode. The vug is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 5.2 x 4.4 x 1.5 inches (13.2 x 11.3 x 3.9 cm) and weighs 19.6 oz or 1.22 lbs (557g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 12DG05206605

Polished Face Fluorescent Dugway Geode Half

$99.00

Exceptional Large Cabinet Chalcedony single Chamber Fluorescent Dugway Geode. The vug is like a cavern that has a botryoidal formation with a small stalactite and a formation lined with fine Amethyst influence druzy crystals. This is a very interesting piece. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Top left photo is in in-direct daylight, the bottom 2 left photos are in direct sunlight to better show the lavender Amethyst color. The photo shows a vug open all the way through this piece.This one has a felted bottom and is a very special geode!

Measures 5.22 x 4.1 x 2.5 inches (13.2 x 10.5 x 6.5 cm) and weighs 26.8 oz or 1.68 lbs (762g)

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Polished Face Fluorescent Dugway Geode Half
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Dugway_Geode_24_4_ Polished Face Fluorescent Dugway Geode Half Dugway_Geode_24_3_
Item # 24DG12204152

Polished Face Fluorescent Dugway Geode Half

$49.00

Exceptional two vug Chalcedony Fluorescent Dugway Geode. The vugs are lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is matt polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.7 x 2.6 x 1.1 inches (9.6 x 6.7 x 2.8 cm) and weighs 5.5 oz or 0.34 lbs (156g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 25DG12204141

Polished Face Fluorescent Dugway Geode Half

$29.00

Sold Out!

This is a favorite small Chalcedony crystal Fluorescent Dugway Geode. The crystalline vug is lined with white druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 2.2 x 1.3 x 0.75 inches (5.7 x 3.3 x 1.9 cm) and weighs 1.78 oz or 0.11 lbs (50g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 26DG12202373

Polished Face Fluorescent Dugway Geode Half

$63.00

Exceptional Large Cabinet Chalcedony Fluorescent Dugway Geode. The vug is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is matt polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 5.5 x 4 x 1.3 inches (14 x 10.3 x 3.4 cm) and weighs 16.9 oz or 1.05 lbs (479g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 27DG12203752

Polished Face Fluorescent Dugway Geode Half

$54.00

Highly polished Chalcedony Fluorescent Dugway Geode. The vug is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.9 x 2.6 x 1.3 inches (10 x 6.8 x 3.4 cm) and weighs 10.2 oz or 0.63 lbs (289g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 28DG12203702

Polished Face Fluorescent Dugway Geode Half

$49.00

Highly polished Chalcedony Fluorescent Dugway Geode. The vug is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.5 x 2 x 1.2 inches (9 x 5.2 x 3.2 cm) and weighs 5.9 oz or 0.37 lbs (170g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 29DG12204373

Polished Face Fluorescent Dugway Geode Half

$79.00

Exceptional Large Cabinet Chalcedony Fluorescent Dugway Geode. The vug is lined with fine druzy crystals. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 5.5 x 4.6 x 2.1 inches (14 x 11.7 x 5.4 cm) and weighs 25.4 oz or 1.59 lbs (722g)

Polished Face Fluorescent Dugway Geode Half
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Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Dugway_Geode_32_1_ Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 32DG12209101

Polished Face Fluorescent Dugway Geode Half

$49.00

Exceptional Waterline Vug Chalcedony Fluorescent Dugway Geode. The vug has a calcite base waterline shelf with several quartz crystal formations. The Chalcedony fluoresces a brilliant Green and the shelf a slight orange-red under Short Wave Ultra-Violet Light. This specimen cut face is matt polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.2 x 2.4 x 1.1 inches (8.1 x 6.2 x 2.9 cm) and weighs 6.5 oz or 0.4 lbs (185g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 33DG12207101

Polished Face Fluorescent Dugway Geode Half

$40.00

Beautiful multiple Vug Chalcedony Fluorescent Dugway Geode. The vugs have beautiful and unique formations. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is matt polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.3 x 2.6 x 1 inches (8.5 x 6.6 x 2.6 cm) and weighs 5.9 oz or 0.37 lbs (168g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 34DG12200591

Polished Face Fluorescent Dugway Geode Half

$59.00

Sold Out!

Extraordinary large cabinet largeVug Chalcedony Fluorescent Dugway Geode. The vug has beautiful druzy crystal coating. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 4.8 x 3.5 x 2.1 inches (12.4 x 9 x 5.5 cm) and weighs 20.5 oz or 1.28 lbs (582g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 35DG12206101

Polished Face Fluorescent Dugway Geode Half

$32.00

Beautiful Chalcedony Fluorescent Dugway Geode. The small vugs have beautiful druzy coatings. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is matt polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.1 x 2.7 x 1.3 inches (7.9 x 6.9 x 3.5 cm) and weighs 8 oz or 0.5 lbs (228g)

Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half
Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half Polished Face Fluorescent Dugway Geode Half
Item # 36DG12205101

Polished Face Fluorescent Dugway Geode Half

$49.00

Sold Out!

Beautiful Botryoidal Vug Chalcedony Fluorescent Dugway Geode. The vug has stunning botryoidal formations. The Chalcedony fluoresces a brilliant Green under Short Wave Ultra-Violet Light. This specimen cut face is polished. Fluorescent photos taken with a Nikon coolpix L1 camera with the specimen under a Way Too Cool 254 nm SW 9-Watt Lamp in a black out photo box. Non-fluorescent photos taken with same camera in outdoor natural light. Measures 3.9 x 2.5 x 1.3 inches (9.9 x 6.5 x 3.5 cm) and weighs 8.4 oz or 0.52 lbs (238g)