Jasper is often red because of its iron content ... Use the colander to sift the sediment in search of unique rocks and minerals. Make it a competition. Colin says her local mineral club ...

The Pine Country Gem and Mineral Society of Jasper hosted the field trip, which drew associate club members from as far as Austin. The Central Texas Paleontological Society of Austin brought ...

And all the different varieties of rocks that are out there. It's endless," he said. Walton is passionate about collecting and working with jasper, a mineral with thousands of different varieties.

The state rock is celebrating ... of Geology and Mineral Industries. On the inside, however, the thunderegg can be filled with intricately laced formations consisting of agate, jasper, opal ...