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The set weighs 16 lbs. 9 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.
$280.00
Dugway Geode Bookends
Total weight is 5 lbs. 3 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.
$140.00
Brazilian Agate Bookends
Total weight is 7 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.
$60.00
Brazilian Agate Bookends
Total weight 8 lbs. 4 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.
$75.00
Onyx Bookends
Total weight is 7 lbs. 5 oz.
Onyx is a banded variety of Calcite. The colors of its bands range from white to almost every color except shades of purple, blue and black. It is used for vases, bowls, beads, cabochons and other items. This type is found in Mexico and Pakistan and is often carved and polished into various items. This material is much more readily available and softer than the gemstone commonly called Black Onyx which is a silica gem.
$50.00
Orange Calcite Bookends
The set weighs 13 lbs. 13 oz.
Calcite is a Carbonate mineral that is most widely distributed on the Earth's surface. It is a common constituent of sedimentary rocks with Limestone in particular. A Calcite formation can take on many different shapes and sizes which is dependent on the location, ground water occurrence and temperature. Calcite is usually white or colorless but can be gray, red, yellow, green, blue, violet, brown or black. The deeper the color is usually indicative of the definitive impurities from the earth or water.
$50.00
Geisonoceras Bookends
The set weighs 6 lbs. 15 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.
$55.00
Brazilian Agate Bookends
This set weighs 13 lbs. 10 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.
Amethyst Bookends
This set weighs 9 lbs. 7 oz.
Amethyst is a purple variety of Quartz often used as an ornament. Upon exposure to heat, Amethyst generally becomes yellow, which some refer to as Citrine or "burnt" Amethyst. It occurs in color from a light, slightly pinkish violet to a deep grape purple. It is widely distributed as a mineral, but fine, clear specimens that are suitable for cutting as ornamental stones.
Goethite is named after the German Polymath Johann Wolfgang von Goethe. Goethite is an iron bearing oxide mineral found in soil and other low-temperature environments. Goethite has been well known since prehistoric times for it's use as a pigment. Historically, Goethite has been used as a paint pigment found on cave paintings in France. Its main modern use is that of an Iron Ore content or objects using Iron Ore. Goethite is found worldwide usually in the form of concretions, stalactitic formations, oolites, reniform or botryoidal accumulations.
$185.00
Septarian Bookends
The set weighs 8 lbs. 9 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.
$250.00
Brazilian Agate Bookends
Total weight 10 lbs. 2 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.
$75.00
The set weighs 4 lbs. 2 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.
$38.00
Brazilian Agate Bookends
Total weight is 7 lbs. 6 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.
$60.00
