We use cookies to remember choices you make on functionality and personal features to enhance your experience to our site. By continuing to use our site you consent to the use of cookies. Please refer to our privacy and cookie policies for more information

Skip to main content

Minerals from the Estate of Gerard L. Cafesjian (Online Only) / Pair of Very Fine Book-matched Petrified Wood Slabs

Lot 211
Pair of Very Fine Book-matched Petrified Wood Slabs
2 – 16 March 2019, 15:00 PST
Los Angeles

Sold for US$6,325 inc. premium

Own a similar item?

Submit your item online for a free auction estimate.

How to sell

Looking for a similar item?

Our Lapidary Works of Art specialists can help you find a similar item at an auction or via a private sale.

Find your local specialist


Pair of Very Fine Book-matched Petrified Wood Slabs

Jiangjunmiao area
Qitai County, Junggar Basin
Xinjiang Uyghur Autonomous Region, China

From an area in northwest China, these are consecutive slices of a beautifully preserved, silicified coniferous log. The petrified wood is truly alive with color—possessing a mix of subtle hues that includes red, orange, tan, brown, white, gray and yellow.

The fossilized conifer log was found in a fluvial deposit in the lower part of the Upper Jurassic – Shishugou Group. The Shishugou Group gets its name ("stone tree valley") from the many petrified forests contained within it. These amazing forests contain abundant silicified tree stumps and logs.

The word "petrified" comes from the Greek word "rock" or "stone". Petrified wood is essentially fossil wood where the organic materials have been replaced by a series of minerals with quartz being predominant. Impurities in the quartz silica, contributes to the color variation. This process takes place underground in an oxygen free environment where mineral rich water flows over the organic sediment deposits.

The location where these specimens come from has recently been designated a Chinese National Park, thereby prohibiting any further collecting. Each slab measuring 39 X 26 X 1 1/4 in (99.1 x 66.0 x 3.2cm)


Provenance: Bonhams & Butterfields, Los Angeles, Natural History, December 10, 2012, Lot 1321.

Additional information