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WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
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Agate
Videos
Agate is a banded variety of fibrous chalcedony. Agate stones are characterized by alternating bands of different colored chalcedony and often contain some visible quartz crystals. They are common in
Agate
Polished agate nodule from Malawi
Polished agate nodule from Malawi
When backlit, thin slices of agate can occasionally show their fibrous structure as lines running perpendicular to the bands (top)
When backlit, thin slices of agate can occasionally show their fibrous structure as lines running perpendicular to the bands (top)
Agate exhibiting wall banding (top) and level banding (bottom)
Agate exhibiting wall banding (top) and level banding (bottom)
Agate geode slice with macrocrystalline quartz and a hollow center
Agate geode slice with macrocrystalline quartz and a hollow center
Thunderegg
Videos
A thunderegg is a nodule-like rock, similar to a filled geode, that is formed within rhyolitic volcanic ash layers. Thundereggs are rough spheres, most about the size of a baseball—though they can ran
A thunderegg from the Black Rock Desert in Nevada that has been cut in half
A thunderegg from the Black Rock Desert in Nevada that has been cut in half
A thunderegg from Succor Creek on display at the Oregon State Capitol
A thunderegg from Succor Creek on display at the Oregon State Capitol
A thunderegg agate from Falen Tree, Oregon, US
A thunderegg agate from Falen Tree, Oregon, US
A jasper thunderegg from White Fir Springs, Oregon
A jasper thunderegg from White Fir Springs, Oregon