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Black Hills Smokey Quartz Bookends
BK307c This is an incredible set of bookends made from Black Hills Smokey Quartz. They have been smoothed and highly polished on the face to show the pretty natural Smokey gray color. The top and side surfaces are left natural. The bookends have a gray felt inside and bottom surfaces so they don't mar surfaces they are placed on. They measure over 7 1/8" wide x over 5 1/2" tall x nearly 4 1/4" thick with an awesome design. These bookends were cut and polished in our own lapidary department. A super nice, one of a kind set that would make a super gift!!
The set weighs 7 lbs. 2 oz.
$75.00
Quartz is the second most common mineral in the Earth's continental crust. It is mainly composed of Silica or Silica based minerals. Although Quartz is known by a variety of names, the most important distinction between types of Quartz is that of macro-crystalline, individual crystals visible to the unaided eye, and micro-crystalline, where aggregates of crystals are only visible under high magnification. There are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian which are results of mineral impurities or heat treatments.
Sequoia Petrified Wood Bookends
The set weighs 13 lbs. 1 oz.
$180.00
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
This set weighs 4 lbs. 3 oz.
$40.00
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.
Picasso Marble Bookends
This set weighs 4 lbs. 1 oz.
$45.00
Marble is a metamorphic rock consisting of Limestone but composed mostly of Calcite. It is used extensively for sculpture, building materials and has many decorative uses. The pure white Marble is probably the most common form known, but the characteristic swirls and veins of many colored Marble varieties are usually due to various mineral impurities such as Clay, Silt, Sand, Iron Oxides or Chert. 7-19-11
Sodalite Bookends
This set weighs 6 lbs. 8 oz.
$70.00
Sodalite is a rich royal blue mineral enjoyed as an ornamental stone. Although massive samples are opaque, Crystals are usually transparent to translucent. It is very similar to Lapis but with out the Pyrite Crystals and distinguishable color differences. It makes great jewelry, cabochons and beads.
Septarian Bookends
They weigh 6 lbs. 5 oz.
$85.00
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.
Geisonoceras Bookends
Total weight 4 lbs. 9 oz.
$35.00
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.
Brazilian Agate Bookends
The total weight is 11 lbs. 15 oz.
$120.00
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.
Orthoceras Bookends
The total weight is 8 lbs. 10 oz.
$38.00
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.
Petrified Wood Bookends
The set weighs 7 lbs. 10 oz.
$100.00
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.
This set weighs 9 lbs. 4 oz.
$65.00
Quartz is the second most common mineral in the Earth's continental crust. It is mainly composed of Silica or Silica based minerals. Although Quartz is known by a variety of names, the most important distinction between types of Quartz is that of macro-crystalline, individual crystals visible to the unaided eye, and micro-crystalline, where aggregates of crystals are only visible under high magnification. There are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian which are results of mineral impurities or heat treatments.
