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Striations in Sandstone. Chimney Rock Canyon. (Striations in Sandstone. Chimney Rock Canyon.)

Striations in Sandstone. Chimney Rock Canyon. (Striations in Sandstone. Chimney Rock Canyon.)

How To Make Your Own Fossils

How To Make Your Own Fossils

Fulgurites aka "Petrified Lightning" - natural hollow glass tubes formed in quartzose sand, silica, or soil by lightning strikes.  They are formed when lightning with a temperature of at least 1,800 °C (3,270 °F) instantaneously melts silica on a conductive surface and fuses grains together; the fulgurite tube is the cooled product. This process occurs over a period of around one second, and leaves evidence of the lightning path and its dispersion over the surface.

Fulgurites aka "Petrified Lightning" - natural hollow glass tubes formed in quartzose sand, silica, or soil by lightning strikes. They are formed when lightning with a temperature of at least 1,800 °C (3,270 °F) instantaneously melts silica on a conductive surface and fuses grains together; the fulgurite tube is the cooled product. This process occurs over a period of around one second, and leaves evidence of the lightning path and its dispersion over the surface.

Strawberry Onyx, Ribbon Rock Mine, Bristol Mountains, California

Strawberry Onyx, Ribbon Rock Mine, Bristol Mountains, California

∷ Variations on a Theme ∷ Collection of Sun Faded Stones

∷ Variations on a Theme ∷ Collection of Sun Faded Stones

Plume Agate, Cady Mountains, Ludlow, California

Plume Agate, Cady Mountains, Ludlow, California

Corundum variety Ruby in Ziosite, 52.81 ct, Mt Kilimanjaro, Tanzania

Corundum variety Ruby in Ziosite, 52.81 ct, Mt Kilimanjaro, Tanzania

Microcline with Quartz and Albite from Colorado

Microcline with Quartz and Albite from Colorado

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