Cold Mountain Thundereggs - 50 lb lot Tumbled Stone polished to a high shine

polished to a high shine

and a few black dendrites

Amazonite displays a blue-green color with varying shades

The picture in the lower right shows what the material looks like cut and polished

blue or violet

Cold Mountain Thundereggs - 50 lb lot Tumbled Stone polished to a high shineCold Mountain Thundereggs are similar to Butterfly Jasper, but offer a brighter range of colors. They can contain water banding, and feature red, mauve, or black "webbing." While technically a rhyolite due to its thunderegg nature, Cold Mountain Thundereggs are highly silicate and filled with brecciation. This material takes an exceptional polish, which makes it ideal for both cabochons and specimens. The rough nodules usually have a bumpy exterior,