Dugway Geodes, Utah
The Dugway Geode Beds are a great place to collect geodes. Here the geodes are 0.25" to 2' in diameter. Some have nice clear or milky quartz crystals, and some have white or light-blue chalcedony inside.
Almost all Dugway geodes fluoresce green under UV light. This is due to uranium salts trapped in the chalcedony. The levels of uranium is so low though that it is undetectable.
They are fairly easy to collect. Once you have reached the site, pick a place, any place, and start digging. You are looking for the layer of clay. The geodes are buried under the clay. It will be between 1 and 4 feet down. The clay can be hard and compact so you may want to use a pick to get through it. You should find geodes as soon as you start to get through it. If you don’t find any clay or geodes move to another spot. There are some mining claims in the area, so make sure you do not trespass.
Many of the geodes are rather bland on the inside. Lots have crystals, and if you break them open with a hammer, you will destroy them. The best way to open a geode is to cut it open. We do cutting for a fee.
We have seen many things besides chalcedony and quartz crystals come inside the geodes, things like amethyst, water, calcite crystals, barite crystals, and jasper.
People often bring me geodes with other things they have "found" inside. Things like metal shavings, gold wires and nuggets, silver ore, and fossils do not occur in geodes. But it is always amusing to see what people have done to them.