last update   11/22/17

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Mills Geological

High-quality, identified petrified wood and plant fossils from around the globe

Our Featured Specimen

We wish all of our American friends a lovely Thanksgiving!  

Jim Mills

and Beth Myers

Bald Cypress (Taxodium sp.)

Columbia Basalts Group, Miocene

Saddle Mountain, Washington

** So just what makes this specimen unusual enough to qualify for our “featured” spot?  Saddle Mountain wood is almost always beautiful, and this one certainly  is.  The colors in Saddle Mountain wood are almost always “wood-like” and attractive.  Check.  But this piece has something that is rather special.  It has several different “centers” (five of them by our count) but only one of them was dominant.  This was likely a strong limb (not a trunk) which had four different side branches and twigs which never got past an early age before being completely encapsulated by more rapidly growing xylem of the main limb.  The largest branch only achieved eight years of growth while the smallest of the group only achieved five years.  These kinds of features contribute to outstanding patterning in slabs of petrified wood and make them excellent display pieces.  If you already have a slab of this great wood from this locality, it may be time to upgrade or add an additional specimen!  Nice manageable size, warm autumnal colors.


Bald cypress occurs mainly along riparian wetlands subject to periodic flooding by silt-rich "brownwater" rivers.  The generic name is derived from the Latin word "taxus" meaning "yew" and the Greek word "eidos" meaning "similar to."  The trees are especially prized for their heartwood because it is extremely rot and termite resistant.  The heartwood of living trees contains a sesquiterpene called cypressene, which acts as a natural preservative.

7.5” x 5.5” on the polished face;  7/16” thick slab   $129

Palm (Palmoxylon sp.)


Hanidh, Eastern Province, Saudi Arabia

**  This log was found and brought home by an American Geologist working in the Saudi Arabian oil fields in the last half of the 20th century. It is a locality almost guaranteed to be not represented in most American collections!   If that includes you, then here’s an opportunity to fill that vacancy.

7.25 x 2 inches on polished face; 3/8” thick slab   $75

Conifer (Pinales Order)


Terrebonne, Oregon

** Unusual Locality!  Beautifully patterned slab from a locality not often seen on the petrified wood market.  The community of Terrebonne is located inbetween the Deschutes River and the Crooked River, approximately 20 miles south of the confluence of these two rivers.  Both of these two rivers have produced spectacular woods (Deschutes River to the north and Crooked River to the south) so a slab from Terrebonne would make a great link between those two petrified wood classics.  This is an unusual locality, so don’t miss a chance here!

10.5” x 5.75” on polished face; slab 5/8” thick   $179

Juniper (Juniperus sp.)

Toe Jam Creek Formation, Oligocene

Tuscarora, Nevada

** A phenomenal slab from a renowned locality with a humorous formation name!  The Tuscarora locality is famed for its brilliant shades of red, orange, gold – and its interesting patterns.  This slab is from an old collection.  How do we know that?  No one we know today is cutting slabs from logs this gorgeous at 1/2” thick!  All of the wood we have ever seen from Tuscarora is "squished" (a not-so-technical term) indicating that perhaps it was quite wet and spongy when it was buried under a great deal of volcanic ash. It is possible that the deposit might have been a pond with sunken logs in a "waterlogged" condition, making them susceptible to being compressed by the great weight of the ash into oval and diamond shapes instead of their original round configuration.  Part of the story that goes with this fabulous wood!

12" x 6" on polished face; 1/2" thick slab   $195

Conifer (Subclass Pinidae)

Indeterminate age

Southwestern Rub’ Al Khali, Najran Province, Saudi Arabia

** Unusual locality here! This interesting piece was collected several decades ago by an oil geologist working in Saudi Arabia.  It was found in a gravel plain between two Pleistocene-aged dune fields so he was unable to determine the actual age of the fossil wood itself.  There is just enough preservation that we could find some tracheids and determine that this was a conifer.  There simply is not a lot of wood from the Middle East on the American market, and even less from this unusual locality wherein the wood was transported in from some other distant location.  This is a locality almost guaranteed to be unrepresented in most collections!  If you like to have a wide diversity of localities in your collection, this is a good opportunity to add a new one!  It is a chunk off of what would have been a very much larger trunk and is cut on the transverse of the wood grain.

6” x 4” on the polished face; 1/2 inch thick slab   $45

Limb Cast (Incertae sedis)

Wiggins Fork Formation   Eocene

Wiggins Fork of the Wind River, near Dubois, Fremont County, Wyoming

** A most interesting limb cast (slab) with exceptionally dense green moss agate.  It really appears to be almost a teal -- dark blue green.  Wiggins Fork has always been known for the light green coloration of its limb casts but frankly we have never seen one of such a dark forest green-blue hue.  We particularly like the way some of the cavities in the cast are lined with nice contrasting white chalcedony.  Fascinating piece!

4.5” diameter on polished face; end cut, up to 1” thick   $79

In Memoriam

Norm Donpon of Meandarra, Queensland Australia

We are sad to report the passing of Norman Donpon of Meandarra, Queensland, Australia, who died in early November at the age of 91.  Petrified wood collectors who own the book Petrified Forests – The World’s 31 Most Beautiful Petrified Forests by Ulrich Dernbach will recognize this legendary collector featured on pages 96-99 of that book.  Norm had an incredible, self-collected collection of petrified wood (particularly tree ferns) that was donated in its entirety to the Historical Village in Miles, Queensland, where it is on permanent display in its own building.  We spent several days with Norm in 2005 and were treated by him to a personal tour of the amazing collection in Miles.  If you ever had the opportunity to meet Norm you might agree that he had a gruff exterior, but in fact he was kind and proud and knowledgeable – a rockhound to the core – who lived his dream of having his own museum!

Norm’s health began to decline soon after our visit and his field collecting came to an end.  The public in general, and rock collecting enthusiasts in particular, have benefited by his knowledge and generosity.  We are taking this opportunity to share a few photos of Norm and the collection.  

Thanks Norm and rest in peace.

Conifer (Taxodiaceae Family)


Eagles Nest, near Burns, Oregon

** A quite long limb section from this classic locality. There is some good structure showing on the polished face, as seen in the closeup.  We seldom see conifers from this locality which seems to yield mainly dicot species.  If you are a collector specializing in limb sections this one will want to be in your collection!  Excellent piece!

1” x 5/8” on polished face; limb section 8” in length  $30