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Petrified Wood Bookends
The set weighs 9 lbs. 10.1 oz.
Petrified Wood is a type of a fossil as it consists of fossil wood where all the organic materials have been replaced with minerals while retaining the original structure of the wood. These minerals are most often Silicates such as Quartz. Other minerals, Manganese, Iron and Copper, in the water or mud during the petrification process gives Petrified Wood a variety of color ranges: black - Carbon; green/blue - Copper; red/brown/yellow - Iron. Petrified Wood can preserve the original structure of the wood in all its detail all the way down to the microscopic level. Structures such as tree rings and the various tissues are often observed features. Although Petrified Wood can be found worldwide, it is rather rare in larger quantities and at times can be difficult to obtain by the average collector.
$170.00
Brazilian Agate Bookends
The total weight is 5 lbs. 1 oz.
Agates mostly occur as nodules in volcanic rocks or waters containing silica in solution possibly derived from the decomposition of silicates in the lava. The siliceous matter is deposited in regular layers resulting in the banded or striped formation.
$40.00
Aragonite Bookends
This set weighs 6 lbs. 3.2 oz.
Aragonite is a Carbonate mineral that can occur in conjunction with Calcium Carbonates. Aragonite differs from Calcite in the formation of the Crystal shapes which can be in lattice, crystal, columnar or fibrous in many different designs, shapes and sizes. Aragonite will form in mollusk shells, oceans and salt water caves as inorganic precipitates called marine cements and speleotherms. Ammolite is a form of Aragonite with impurities that make it iridescent and valuable as a gemstone.
$48.00
Brazilian Agate Bookends
This set weighs 8 lbs. 15.3 oz.
Agates mostly occur as nodules in volcanic rocks or waters containing silica in solution possibly derived from the decomposition of silicates in the lava. The siliceous matter is deposited in regular layers resulting in the banded or striped formation.
$70.00
Brazilian Agate Bookends
This set weighs 3 lbs. 5.9 oz.
Agates mostly occur as nodules in volcanic rocks or waters containing silica in solution possibly derived from the decomposition of silicates in the lava. The siliceous matter is deposited in regular layers resulting in the banded or striped formation.
$50.00
Dugway Geode Bookends
The set weighs 12 lbs. 1.5 oz.
Geodes are geological rock formations which occur in sedimentary and certain volcanic rocks. They are essentially rock cavities or vugs with internal Crystal formations or concentric banding. The exterior is generally Limestone while the interior contains Quartz Crystals and/or Chalcedony deposits. If the Geode is completely filled with Crystal, being solid all the way through, it is then called a nodule.
$210.00
Septarian Bookends
They weigh 7 lbs. 7 oz.
Septarians are commonly composed of a carbonate mineral such as Calcite, a microcrystalline form of Silica as in Flint or Jasper, or an Iron Oxide such as Hematite. These specimens are also known as a concretion which is a type of sedimentary rock. Septarians were formed millions of years ago by sediment forming around a fossil to create a mud ball transforming the fossil into Calcite and Aragonite.
$235.00
Brazilian Agate Bookends
BK307b Here's a nice set of Purple (color enhanced) bookends made from Brazilian Agate. They have been cut and highly polished on the face and inner surfaces. They measure 7 1/4" wide x 4 1/2" tall x 2 3/4" thick. They have a great mix of colors and Agate banding! You can turn them around and create a whole new set. The rough back side of the set is pretty amazing as well !
The set weighs 4 lbs. 7 oz.
Agates mostly occur as nodules in volcanic rocks or waters containing silica in solution possibly derived from the decomposition of silicates in the lava. The siliceous matter is deposited in regular layers resulting in the banded or striped formation.
$35.00
Geisonoceras Bookends
Total weight 6 lbs. 5.1 oz.
Geisonoceras is a genus of extinct Nautiloid Cephalopod. These fossils are common and have a global distribution which occur in any marine rock, especially Limestone. Geisonoceras has an orthoconic shell with transverse lirae and striae that are periodically thickened
$50.00
Sea Jasper Bookends
This set weighs 5 lbs. 9.8 oz.
This material is a new find from Madagascar. The deposit formed as a rhyolite flow but has been completely silicified. The Rhyolitic eyes or orbs come in an astonishing array of colors and color combinations. The back ground can be white, pink, green, red, or yellow. Botryoidal formations as well as white and deep green druzy are also common. This deposit has been discovered at the edge of the ocean. It can only be seen and collected at low tide. The area has no road so the material must be transported to civilization by boat. This material is fast becoming a rarity in the Jasper ocban fields, so get one while it is still available.
$60.00
Petrified Wood Bookends
The total weight is 7 lbs. 8.5 oz.
Petrified Wood is a type of a fossil as it consists of fossil wood where all the organic materials have been replaced with minerals while retaining the original structure of the wood. These minerals are most often Silicates such as Quartz. Other minerals, Manganese, Iron and Copper, in the water or mud during the petrification process gives Petrified Wood a variety of color ranges: black - Carbon; green/blue - Copper; red/brown/yellow - Iron. Petrified Wood can preserve the original structure of the wood in all its detail all the way down to the microscopic level. Structures such as tree rings and the various tissues are often observed features. Although Petrified Wood can be found worldwide, it is rather rare in larger quantities and at times can be difficult to obtain by the average collector.
$125.00
Orthoceras Bookends
The total weight is 6 lbs. 5.9 oz.
Orthoceras is a genus of extinct Nautiloid Cephalopod. These fossils are common and have a global distribution which occur in any marine rock, especially Limestone. These are slender, elongated shells with the middle of the body chamber transversely constricted and a sub-central orthochoanitic siphuncle. The surface is ornamented by a network of fine lirae or fine lines/ridges.
$40.00
