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Earth Day Gems - Wood, Palm, Trees and Coral that Mineralized Over Time!

To celebrate Earth Day this year, we decided to share some information with you about some of our favorite wonders found on Earth - fossilized wood, amber, and much more!

Petrified Wood

Petrified wood is a fossil of wood in which organic matter has been replaced by a mineral such as agate, bit by bit, as it decomposes.  The wood structure is maintained, but the wood fibers are slowly changed into stone.  The result is a fossil of the original woody material that often displays preserved details of the bark, wood, and cellular structures.  Sometimes a jasper, quartz, pyrite or even opal (shown above) can be found fossilized in wood.

Petrified Palm

Petrified palm is another fossil, similar to fossilized wood.  When the palm died many millions of years ago, it had an opportunity to be preserved as a fossil if it was quickly covered by water and sediments that would protect it from oxidation and destructive organisms.  Over time, those sediments replaced the organic matter turning it into a fossil.


Amber is a fossilized tree resin formed by millions of years of slow processing under heat and pressure.  These specimens are typically 25 to 50 million years old, but some pieces have been found that date back 130 million years.  Wow!  This is one of the few gems where inclusions are more desireable and increase value.  The most common colors of amber are yellow and orange, with red and green being more rare colors.


Flint is a variety of quartz and sometimes is found under a wide variety of names, including chert, jasper, agate, and chalcedony.  These gems polish nicely and has a waxy finish.

Fossilized Coral

Fossilized coral is not to be mistaken for endangered coral or precious coral, as it's structure is preserved in quartz.  Specimens have a dull to waxy luster and interesting skeletal-like ancient coral patterns, most often appearing in flower shapes.  They're most commonly found as a cabochon or set in that type of jewelry and considered an agatized "natural gem".  They come in a variety of colors: white, pink, red, black, brown, grey, and yellow. 


Jet is an organic material composed of fossilized wood and is also found under the name lignite.  Different from petrified wood, it is created by decaying wood under heat and pressure.  A form of bituminous coal, jet can be polished to produce a waxy, velvety luster.  It is a softer, low-density stone with a hardness of 2.5-4 on the Moh scale. Jet are gems kind to people in difficulty and fear and has a very calming energy. Healing grief is a primary purpose for jet in the emotional realm. It brings grief to the surface in a gentle manner to be alleviated and healed with the protection of sympathy and comfort. 


Ammonites are fossilized ancient cephalopods (like squid, octopuses, and nautiluses).  They are among the most widely known fossil.  These creatures lived in the seas between 240 - 65 million years ago, when they became extinct along with the dinosaurs. There are three basic patterns for ammonite septa or walls of the shell
  • irregular zigzags called goniatite
  • regular wavy called ceratite
  • intricate feathery or fern like patterns called ammonite
Ammolite may be found on ammonites which inhabited a prehistoric, inland subtropical sea that bordered the Rocky Mountains.  Ammolite is the term to describe the iridescence in some ammonite shells and is made by the same mineral that nacre is composed of.
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