Petrified Wood, Geodes, Crystals, Agates and Carvings

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Cost

Item Description

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$135.00

PR100b  This is something different for the polished rock collector.  Here is a very nice large polished slab cut from a specimen of Brazilian Agate.  It measures 11 1/4" x nearly 6" x 2 1/4" thick and is polished on one side.  This beautiful piece has a tiny crystal cavity with a great Agate design throughout.  Just gorgeous!

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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.

agate

Brazilian Agate

$40.00

PR101c  Here is a very beautiful Madagascar Petrified Wood free form.  This awesome Petrified Wood has rich tan, red, brown and black colors all in an unique design.  This lovely specimen has a nice polish on all surfaces except the bottom. As you can see from the photo there are some fracture lines but it does not affect the stability of this piece.  It measures over 3" wide x nearly 2 5/8" x almost 4" tall and weighs 1 3/4 pounds.  A truly beautiful piece of polished Wood.

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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.

polished rock

Petrified Wood

$30.00

PR102b  This is a gorgeous Black Skin Agate specimen from India.  This lovely piece measures almost 3 3/8" x 3 1/2" x 2 1/8" thick and has an excellent polish on all sides.  This fabulous specimen shows beautiful black, white and gray colors accented with browns in the unique Black Skin Agate design.  Very beautiful!

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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.

polished rock

Black Skin Agate

$60.00

PR103c  Here is a really great find!!  This is a nice, above average quality Dugway Geode from Utah.  It measures almost 6 5/8" wide x 4 5/8" x 1 5/8" thick and has a nice polish on the front face. The inside of the lovely irregular cavity is lined with fine druzy Quartz Crystals with a pale gray to nearly clear color.  The inside shows up a bright aqua green under short wave UV light.  It's very, very nice.

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Click here to buy Ultraviolet Lamps

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.

polished rock polished rock

Dugway Geode

$90.00

PR104b  Here is an amazing Amethyst geode section.  This gorgeous piece has lots of sparkly purple tinted Amethyst crystals. This large piece measures 9" x nearly 7 3/4" x over 4 1/4" and weighs almost 10 1/4 pounds with a natural unpolished appearance. This was part of a larger geode at one time and is a real beauty!

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Click here to view more Amethyst specimens!

Amethyst is a purple variety of Quartz often used as an ornament. It occurs in color from a light, slightly pinkish violet to a deep grape purple. Upon exposure to heat, Amethyst generally becomes yellow, which some refer to as Citrine or "burnt" Amethyst. It is widely distributed as a mineral, but fine, clear specimens that are suitable for cutting as ornamental stones.

polished rock

Amethyst

$12.00

PR105c   This is a polished Free Form made of Crazy Horse Granite from the Black Hills of South Dakota.  This cool specimen has good color, a nice design in the rock and a polished face with balance left natural.  It measures almost 5 1/8" wide x 1 1/2" thick x 4 1/4" tall.  The specimen was handcrafted in our own lapidary department.  Definitely a one-of-a-kind treasure or makes a great gift!

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Granite is a common and widely occurring type of intrusive igneous rock. Granites are usually medium to coarse grained, occasionally with some individual Crystals. It can be pink to dark gray or even black depending on the chemistry and mineralogy. It is a hard and tough substance is used mostly in construction and landscaping.

polished rock

Black Hills Granite

$45.00

PR106b  This is a very pretty, above average quality Agate Geode of an unknown origin.  It has been cut and polished on the face here at the Rock Shed to show the awesome inside design.  The exceptional center has sparkly crystals surrounding the middle circle with interesting character.  The very pretty Agate Geode measures 5 5/8" wide x 4 7/8" x almost2 1/8" and weighs nearly 2 1/4 pounds.  It makes for a very interesting display piece or would make an excellent gift.

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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.

polished rock

Agate Geode

$235.00

PR107c    Here is something new and different; an excellent example of Amphibole Quartz from Bahia, Brazil.  The Amphibole Quartz has amazing clarity showing the wonderful inclusions of Limonite (yellow), Hematite (red), Kaolinite (white) or Lithium (pink).  This fascinating Quartz crystal is 6" long x nearly 3 1/4" x almost 2 1/4" with excellent colorful inclusions.  The multi-faceted crystal is all natural with a very nice finish.  Like most Quartz, pictures just don't do it proper justice!

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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.

polished rock

Amphibole Quartz Crystal

$80.00

PR108c  This is an above average quality Rose Quartz Free Form from Brazil.  This gorgeous Rose Quartz has a lovely rose Pink color with lots of character and a nice polish.  It measures 5 7/8" x 4 1/4" x almost 2 1/2".  A very nice piece indeed!

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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.

polished rock

Rose Quartz Free Form

$18.00

PR109b  This is a very nice, above average quality multi-colored Marble Mortar and Pestle.  The mortar measures nearly 3" in diameter x almost 3" tall with the pestle being 1 3/8" in diameter x nearly 3 7/8" long.   It has a nice Gray and Black colors with lighter accents and is highly polished all around except for the bottom.  It makes for a very interesting display piece or would make a nice gift.

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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.

polished rock

Marble Mortar and Pestle

$20.00

PR110b  This is a very beautiful specimen of polished Green Fluorite.  The fantastic Green Fluorite specimen is highly polished on all sides except the bottom and has a super range of bright shaded Green colors with a very nice design. The overall size of this gorgeous specimen is 2 1/4" wide x nearly 1 1/4" x almost 3 1/4" tall and weighs just over one half pound.

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Fluorite, also referred to as fluor-spar, is a mineral composed of Calcium Fluoride.  It is a widely occurring mineral found world wide and is often found with metallic minerals such as Galena, Sphalerite, Barite, Quartz and Calcite.  Fluorite may fluoresce strongly in ultraviolet light which may be due to the presence of some impurities such as Yttrium.  Blue is the most common color but red, purple, green, yellow and white are also frequent.  It can be used in high performance telescopes, camera lens, enamels and in the making of opalescent glass.

polished rock

Green Fluorite

$65.00

PR111b  Here is something different from the gift department at the Rock Shed.  This is a very cool Amethyst Geode section with a gorgeous center.  The attractive and sparkly Amethyst is full of pretty purple tipped crystals accented by a sprinkling of Clear and White Quartz crystals.  This lovely piece measures nearly 7" x almost 3 3/4" x 2 7/8" tall.  It would make a great addition to any rock collection or a beautiful decoration item in your home as well as an awesome gift.

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Amethyst is a purple variety of Quartz often used as an ornament. It occurs in color from a light, slightly pinkish violet to a deep grape purple. Upon exposure to heat, Amethyst generally becomes yellow, which some refer to as Citrine or "burnt" Amethyst. It is widely distributed as a mineral, but fine, clear specimens that are suitable for cutting as ornamental stones.

polished rock

Amethyst

$24.00

PR112b  Here is a very nice, above average quality Tumble Polished Carnelian  Free Form.  It measures 2 3/4" x over 1 3/4" x almost 1 5/8" thick and has a good polish on all sides.  This very cool specimen has awesome Dark Red and Burnt Orange colors with a nice design on each side of it including excellent agate banding.   It has many healed fractures, very common for this material.  Very, very nice!

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Click here to view more beautiful Tumble Polished Rocks

Carnelian is a red or reddish-brown variant of Chalcedony but also may come in the colors of orange and pink.  It is quite common and usually found in translucent pebble form.  It is found in several areas of Europe, Iceland and Madagascar.

polished rock

Carnelian

$28.00

PR113c  This is a very pretty larger Amethyst Cactus Quartz Crystal Cluster with a unique shape.  This extraordinary piece measures 2 1/2" x over 1 3/8" x nearly 1 7/8" and has not been polished.  This naturally sparkly specimen with multiple lovely lavender points is from the Magaliesberg Mountains west of Pretoria, South Africa.  Close inspection shows some minor tip damage and reflected in our price.  A true beauty of nature!

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These Cactus Quartz Crystals are often slender Crystal cores with Amethyst tips and are coated with orange Hematite stained mini Crystals giving the bristly, cactus appearance.  Sometimes they may have a druzy veil in lavender or yellow or white.  Each in unique in their own right and can not be duplicated.

polished rock

Cactus Quartz Crystal

$80.00

PR115b   This is a very cool Poly Chrome Jasper Free Form.  Highly polished on all sides, it has amazing colors, ranging from a pretty pale green background color to brown and cream to dusty rose and orange accents; all in a excellent Poly Chrome design.  This gorgeous piece measures nearly 4 7/8" wide x 2 3/4" x over 6 3/4" tall and weighs over 4 1/4 lbs.  It would make a great addition to any rock collection or a beautiful decoration item in your home.

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Jasper, also known as spotted stone, is an opaque, impure variety of Quartz that is usually red, yellow or brown in color.  The mineral breaks with a smooth surface and is used for ornamentation or as a gemstone.  It can be highly polished and is used for vases, seals, and other decorative items.

polished rock

Polychrome Jasper

$154.00

PR129b  This is a beautiful Brazilian Amethyst Cathedral with a gorgeous Amethyst Geode center.  The very attractive and sparkly center cavity is full of pretty lighter Purple tipped Amethyst crystals.  This lovely piece measures 9 1/8" wide x 6" 9 3/4" tall and weighs nearly 15 1/2 pounds.  It would make a great addition to any Amethyst collection or a beautiful decoration item in your home as well as an awesome gift.

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Click here to view more Amethyst Cathedral specimens!

Amethyst is a purple variety of Quartz often used as an ornament. It occurs in color from a light, slightly pinkish violet to a deep grape purple. Upon exposure to heat, Amethyst generally becomes yellow, which some refer to as Citrine or "burnt" Amethyst. It is widely distributed as a mineral, but fine, clear specimens that are suitable for cutting as ornamental stones.

polished rock

Amethyst Cathedral

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