There's also the matter of coloration. Cross-sections of petrified wood often showcase a glistening rainbow of colors, which ...

Located in the south are the major concentrations of the famous colorful petrified wood; in the north rise the colorful banded badlands of the Painted Desert. Giant fossilized logs, many of them ...

In 1966 whilst staying in the opal-mining area of Andamooka,South Australia, looking for opals around the mouth of an opal mine (noodling)I found an aboriginal stone cutting implement made from ...