SiO2, SiO2-31% Other
Thunder Eggs or Easter Eggs
Thunder Eggs are the Oregon State stone for good reason. Because of the profuse volcanic activity over time, thunder eggs are scattered all over the state. The Egg description is from the configuration. They are literally lava and ash bubbles and take on uneven spherical shapes for the most part. Like Easter eggs, they are often times hidden and always fun to find.
Land of Thunder
The terrain reflects the intensity of the volcanoes in the area. Erosion leaves spires and canyons between the soft and hard minerals left from lava flows. These incredible areas are where one may seek these treasures like this picture taken near Succor Creek in the Owahee desert.
Gemstones in the Yolks
The center of the egg can be filled with Jasper, Agate, Quartz, and even Opal among other minerals. Opening them is like biting into a chocolate or opening up xmas presents. The color of the material is dictated by the adjacent minerals during the volcanic and settling events.
Like Peering into sugar Eggs
Just like Picture Jasper and other gemstones presenting landscapes, Thunder Eggs can exhibit fantastic little dioramas. Have you ever seen a sugar egg where you peer through a hole and see a miniature scene? Cutting and polishing these gems can have the same effect with a myriad of different tiny worlds revealed.
In this picture, you can see the Rhyolite or egg shell on the right side. Many times the Rhyolite can be just as interesting as the contents of the egg and shines up to jewelry quality as well. The color of the shell does not coincide (as far as my experience) with the contents inside. In this case, dark red, brown and green Rhyolite gave way to teal through greenish-white common opal. So close to actual Precious Opal but without the flash, we'll keep hoping for the Precious Opal find.