Petrified Wood, Geodes, Crystals, Agate and Carvings

Page 10

Cost

Item Description

Click Picture
for Larger Image

Another photo.

Another photo.

Orange-White Calcite

Another photo.

Agates mostly occur as nodules in volcanic rocks or waters containing Silica in solution which is 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.  It is very unlikely that you would ever find an exact duplicate of any type of Agate, Brazilian or other.

Brazilian Agate Geode End

Item will be similar to item in photo.

Selenite, also known as Satin Spar, Desert Rose and Gypsum Flower, are the four Crystalline varieties of Gypsum.  It is a very soft material composed of Calcium Sulfate.  Selenite is often transparent and colorless.  If color is present it is often due to impurities or presence of other minerals. 

Selenite Massage Wand

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.

Rutilated Quartz

Another photo.

Labradorite is a Feldspar mineral that occurs in large Crystal masses in anorthosite and shows an iridescence or "play of colors."  Gemstone varieties of Labradorite exhibiting a high degree of iridescence are Spectrolite, Moonstone and Sunstone.  High quality samples with good iridescent qualities are desired for jewelry.

Labradorite

Marble is a metamorphic rock consisting of Limestone but mostly composed 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.

Another photo.

Marble Vase

Another photo.

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 of Onyx is found in Mexico and Pakistan.  It is often carved, polished and sold in a variety of different things. 

Onyx Dish with Lid

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 give 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.

Petrified Wood

PR1000c  This is a very pretty, above average quality Smokey Quartz Crystal cluster.  This crystal has several crystals in very good quality.  It has a nice Crystal grouping on both sides of the specimen.  This one measures 7 1/2" x 4 1/2" x 1 3/4".  A true beauty.

Another photo.

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.

Smokey Crystal Quartz

PR1002b   Here is a wonderful find!!  This is a very nice, very pretty Dugway Geode from Utah.  It measures 2 3/4" x 3 1/2" x 1 5/8" and is polished on one side.  A very nice conversation piece or a pretty display item.

Another photo.

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.

 Dugway Geode

PR1004b   This is a very pretty, above average quality Quartz Crystal cluster.  This crystal has several crystals in very good quality and with near perfect points.  It is virtually clear with a few internal inclusions that give a real sparkly appearance.  This one measures 3 3/4" x 1 7/8" x 2 1/2".  A true beauty.

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.

Crystal Quartz Cluster

PR1013b   Here is a very cool Green Calcite Free Form from Mexico.  It has many, many crystals in various shades of green. It measures 4 7/8" x 4" x 2 1/4" and is nicely polished.  A very unique gift for someone special or add it to your own collection.

Another photo.

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.

Green Calcite

PR1011b   This is a very pretty, larger desert Selenite specimen from Morocco. This specimen measures 4" x 3 1/2" x 3 1/4".  This unusual piece has a soft Copper Brown color with a real unique shape.  A one of a kind gift for that one of a kind person.

Another photo.

Selenite, also known as Satin Spar, Desert Rose and Gypsum Flower, are the four Crystalline varieties of Gypsum.  It is a very soft material composed of Calcium Sulfate.  Selenite is often transparent and colorless.  If color is present it is often due to impurities or presence of other minerals. 

Selenite Desert Rose

PR1010b   This is a very nice Tee Pee Canyon Agate End Cut.   It measures approximately 4 3/4" x  5" x 2 1/4" and is polished on the front face.  This Agate has a nice, natural interior which exhibits a beautiful center with light pastel colors and an interesting Agate design. A nice display piece for your collection.  Very beautiful.

Another photo.

Agates mostly occur as nodules in volcanic rocks or waters containing Silica in solution which is 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.  It is very unlikely that you would ever find an exact duplicate of any type of Agate, Brazilian or other.

Tee Pee Canyon Agate End Cut