Woodworthia sp. Chinle Formation, Arizona Some thirty years ago, in a chromium-bearing formation, a small amount of green petrified wood was found. Chromium is the same element that gives emeralds their magnificent green color. This log section a particularly long one and measures 10 x 3 ½ x 2 in.
Woodworthia sp. Chinle Formation, Arizona Some thirty years ago, in a chromium-bearing formation, a small amount of green petrified wood was found. Chromium is the same element that gives emeralds their magnificent green color. This log section a particularly long one and measures 10 x 3 ½ x 2 in.
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
