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Bear Mountain Thundereggs
Bear Mountain, Silver City, Grant Co., New Mexico
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     The thundereggs of the Bear Mountain are well known for many decades and widely visited by local rock clubs, but they still can be found even today despite the complains by local rockhounds about not finding anything except small ones. The Bear Mountains along edge of Gila National Forest, are mainly limestone with a very hard limestone sticking out like a sore thumb on one side and there are isolated pockets of rhyolitic lava flows, the source of thundereggs. I hit on a strata enriched in the thundereggs on March 2004 and found many thundereggs containing rare sagenite needles (after zeolites), aragonite fans, black calcite crystals, waterline agates, and some with shadowing effect. The colors of the agates are typically colorless to bluish gray, and some white and rarely brownish agates have been found.
    I came back to it two years later, but did not had any luck with digging, and that was when I realized that I passed the narrow strata. That strata was buried under so much tailings left by diggers, and it's going to take a lot of work to uncover that strata. The agate in the thundereggs are typically colorless to blue with some white colors. It's rare to find those with brown colors and those with shadowing effects are even rarer.  I have seen excellent amethyst geodes and agates with shadowing effects from that area. From time to time, I still find some thundereggs there and there.

Updated July 2009, new specimen have 2009y in their code names..
Larger pictures of any interested specimens can be provided at request.

2009yBRM026-$HOLD, rare type

2009yBRM029-$20, few fractures 2009yBRM030-$20, few fractures
or $32 for the pair
2009yBRM031-$20 2009yBRM032-$25,
or $35 for the pair