How big can thunder eggs get?

Thundereggs are agate-filled nodules found in various parts of the Western United States. They range in size from 1/4 inch to as large as 5 feet in diameter. Generally, they are about the size of oranges. All are similar on the exterior, but no two are alike in pattern, design or color on the inside.

What is the biggest thunder egg?

The world's largest thunderegg, a 1.75 ton specimen, is housed by the Rice Northwest Museum of Rocks and Minerals in Hillsboro, Oregon.

How much are thunder eggs worth?

How Much Are Thundereggs Worth? A value of a cut in half and polished thunderegg depends on the size and its fillings and range from a few to a hundred dollars. Specimens with scenic moss or plumes looking like plants or flowers are among the most valuable eggs and can cost up to $200.

How do you identify a thunder egg?

Thunder eggs are red, light-pink, pinkish-red, reddish-brown, and brown from the outside because of the color of rhyolites. Thunder eggs are not perfectly round from inside. Chalcedony or agate can form star-like figures. Geodes are hollow inside.

How do you cut a thunder egg?

While most of the work can be done with things found at the hardware store, slicing the egg open will require some sort of saw. Thundereggs 1” or under can be cut with diamond cut-off wheels in a Dremel or flex-shaft but the cut will be rough.

Thunder Eggs

What is inside a thunder egg?

Thundereggs are rough spheres, most about the size of a baseball—though they can range from less than an inch to over a meter across. They usually contain centres of chalcedony which may have been fractured followed by deposition of agate, jasper or opal, either uniquely or in combination.

What's the difference between a geode and a thunder egg?

Thunder eggs, which are technically known as lithophysae are typically found with solid or near-solid cores of chalcedony or agate, whereas geodes are relatively hollow inside with thinner layers of quartz crystals.

How old is a thunder egg?

“Thunder eggs are gas bubbles that formed in a rhyolite formation between thirty and forty million years ago,” noted Casey.

How old are Oregon thundereggs?

Thundereggs are found in the rhyolite lava flows which spread over Oregon an estimated 60 million years ago during the Eocene Age. Geologists believe the round-shaped thundereggs were formed in gas pockets (bubbles) within the lava, which served as molds.

What is thunder agate?

Thundereggs are agate-filled nodules found in various parts of the Western United States. They range in size from 1/4 inch to as large as 5 feet in diameter. Generally, they are about the size of oranges. All are similar on the exterior, but no two are alike in pattern, design or color on the inside.

Where are thunder eggs found Queensland?

Mount Hay Gemstone Tourist Park, 36 kilometres west of Rockhampton on the Capricorn Highway is an internationally known destination for thunderegg fossicking. Thundereggs or 'volcanic birthstones' are crystalline formations that occur when gas bubbles in molten lava solidify on cooling.

Where can u find geodes?

Geodes are found throughout the world, but the most concentrated areas are located in the deserts. Volcanic ash beds, or regions containing limestone, are common geode locations. There are many easily accessible geode collecting sites in the western United States, including in California, Arizona, Utah and Nevada.

What do you do with thunder eggs?

Thunder Egg is used in the spool of the Sewing Machine to create a Shirt. It can be used in dyeing, serving as a purple dye at the dye pots, located in Emily's and Haley's house, 2 Willow Lane.

What creates a thunder egg?

Thunder eggs are spherical objects which form in some types of silica-rich volcanic rocks (e.g. rhyolites). As the volcanic lava cooled, trapped steam and other gases formed an expanding bubble.

What is the rarest geode color?

The rarest and most valuable geodes contain amethyst crystals and black calcite.

How much is a geode rock worth?

A geode can be worth anywhere from $5 to more than $1000, depending on its type and location. The price will vary widely based on whether the rock has been cut open because geodes often contain crystals inside of them which make them more valuable when exposed correctly (e.g., cutting along an axis).

How do you clean thunder eggs?

The quickest and the easiest way to clean your geodes or thundereggs is to just wash them with plain old soap and water. I'll usually take a soft bristle scrub brush to them as well, to get all the dirt out of the cracks and crevices.

Where can I find thundereggs in Oregon?

One unique place to dig in Oregon is the Polka Dot Agate Mine near Madras owned by West Coast Mining. There's no fee for visiting, but you'll pay a small fee of around $5 per pound to take thundereggs and agates you find home with you.

What's inside a geode?

The hollow interior often is nearly filled with inward-projecting crystals, new layers growing on top of old. The crystals are of quartz, less often of calcite or dolomite, and sometimes of aragonite, ankerite, hematite, magnetite, pyrite, chalcopyrite, and sphalerite.

How do you tell if a rock has a crystal inside?

Test whether the rock has a hollow interior.

Pick up the rock and assess its weight. If the rock feels lighter than that surrounding rocks, it may be a geode. Geodes have a hollow space inside, which is what allows the crystals to form. You can also shake the rock next to your ear to test whether it is hollow.

What should I look for when geode hunting?

Recognizing Geodes. Look for rocks with a bumpy texture. When you're searching, you want to look for lumpy rocks. Geodes have lots of bumps and texture to them, so steer clear of any rocks with a very smooth surface.

How do you find gems in creeks?

To find gemstones in creeks and along riverbeds, one should carefully search near eroded stream banks, in shallow, flowing water, and old, dried creek beds. Alluvial gemstones can usually be found a few days after heavy rainfall. At night, use a black light to search for fluorescent gemstones.

How do you tell if a rock is a geode?