6.9" Polished, Jasper Replaced Petrified Wood Bookends - Oregon

This is a very unique pair of bookends made from agate replaced petrified wood from Hampton Butte, Oregon. The jasper replacement leaves a beautiful coloration with hues of greens and whites but unfortunately destroys the detail that would allow for the type of tree to be identified. The flat edges have been lined with felt.

Each bookend varies slightly in size, one measures 6.9" tall, 6.1" wide and 1.7" thick, the other 6.8" tall, 6.1" wide and 1.7" thick.

Agate is a variety of microcrystalline quartz (chalcedony) that displays translucence and, in some cases, banding. Agate primarily forms when silica-rich fluids fill pockets within rocks and/or fossils, depositing the silica along the walls of the rock. This process can result in banding patterns, as the compositions and impurities of these depositing fluids change over time. These banding patterns can either form as flat layers, creating linear patterns known as waterline agate, or as rounded layers, forming more common ring-like patterns. These patterns depend on the surfaces available for deposition.

Jasper is a term that can be applied to an opaque variety of chalcedony. The opaqueness is due to a higher concentration of impurities mixed with silica/quartz compared to other varieties of silica, such as quartz or agates. Like agate it may form in a wide variety of colors, and is often multi-colored. In most cases, jasper forms when silica-rich fluids permeate throughout a soft sediment or volcanic debris deposit. The fluids then crystallize around the particles/impurities, resulting in a cementation process. Most often, the impurities present determine the coloration of the deposit following solidification, but other factors can play a role in the color of what is now considered a jasper.

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DETAILS
SPECIES
Chalcedony var. Jasper/Agate
LOCATION
Hampton Butte, Oregon
SIZE
6.9 x 6.1 x 1.7"
CATEGORY
ITEM
#158886
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