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36

A Petrified Wood Sphere

Reserves

Estimate:

2,000 to - 3,000 USD

A Petrified Wood Sphere

A Petrified Wood Sphere

Estimate:

2,000 to - 3,000 USD

Lot sold:

5,292

USD

Authenticity guarantee

What is guaranteed?

A Petrified Wood Sphere

Araucarioxylon arizonicum

Late Triassic, approx (225 million years ago)

Chinle Formation, Arizona, United States


6 inches (15 cm) in diameter. 10.1 pounds (4.6 kg).


Displaying tones of brown, pearl, yellow, and orange, this petrified wood specimen has been polished to reveal details of its natural character, outstanding preservation, and well-defined growth rings.

To request a condition report for this lot, please email science@sothebys.com

Only woody plants that are quickly covered in sediment after death are candidates for petrification. Over time, minerals in the anaerobic soil seep into the cells of buried stems and trunks and replace their organic materials with those of the earth in which they're entombed. Because of the wealth of minerals found in Arizona's famed Chinle Formation, natural petrification results in an array of varying colors, earning preserved conifers from this area the nickname "rainbow wood”.


This striking specimen comes from an extinct type of conifer known as Araucarioxylon arizonicum, and represents a chance to own a beautiful and significant piece of a 225 million year old North American ecosystem.