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.
The set weighs 5 lbs. 8 ozs.
$45.00
Ammonites are an extinct group of marine animals of the subclass Ammonoida in the class Cephalopoda, phylum Mollusca. They are excellent index fossils which are fossils that are used to define and identify geologic periods. Ammonites' closest living relative is probably not the modern Nautilus (which they outwardly resemble) but rather the subclass Coleodiea, which are octopus, squid and cuttlefish.
The set weighs 7 lbs. 6 ozs.
$38.00
Orthoceras Bookends
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.
Total weight is 7 lbs. 8 ozs.
$38.00
Brazilian Agate Bookends
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.
Total weight is 7 lb. 15 ozs.
$55.00
Brazilian Agate Bookends
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.
Total weight is nearly 6 lbs..
$48.00
Brazilian Agate Bookends
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.
Total weight is 5 lbs. 5 ozs.
$40.00
Petrified Wood Bookends
The set weighs 6 lbs.
$89.00
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.
Brazilian Agate Bookends
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.
This set weighs 6 lbs. 6 ozs.
$45.00
Sandstone Bookends
Sandstone is a sedimentary rock composed mainly of sand size mineral or rock grains. Most Sandstone is composed of Quartz and/or Feldspar because these are the most common minerals in the earth's crust. It can be almost any color. The Sandstone beds often form highly visible cliffs and are strongly identified with certain regions of the world.
This set weighs 2 lbs. 8 ozs.
$20.00
Septarian Bookends
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.
Total weight 15 lbs.4 ozs.
$250.00
