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Chinco Mtn Thundereggs
Chinco Mountain (Big Bend area)Presido County, Texas |
There are a rhyolite
area in the Big Bend of Texas where the thundereggs are found, but the
quality of those thundereggs are so poor that they had been ignored.
Most thundereggs found there are fractured and filled with
macrocrystalline quartz and hydrothermal chalcedony. Some specimens are
found to contain colorless to ivory colored banded agates with lots of
hoziontal opal layers.
Click on the pictures to see larger and closer-up pictures.
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| Good find! Pink opal with banded agate |
With quartz and inclusions |
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| Agate covering geothite coated quartz crystals |
Typical thunderegg |
White a surprise.