Petrified Wood, Geodes, Crystals, Agates and Carvings

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Cost

Item Description

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$125.00

PR100c  This is something different for the polished rock collector.  Here is a very nice large polished Brazilian Agate.  It measures 9 1/4" x 3 1/2" x 3"  and has a nice polish.  This beautiful piece has a sparkly 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

$80.00

PR101c  Here's a very colorful Jasper Stand Up from Madagascar.  This lovely piece has a good polish and measures 2 3/4" x 2 3/8" x 6 1/2".  It has fabulous color, neat crystal cavity and fabulous design. A great gift or a nice addition to any collection.

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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

Madagascar Jasper Stand up

$50.00

PR102c  This is a gorgeous Black Skin Agate specimen from India.  This lovely piece measures 5 3/4" x 2 3/8" x 2" and has an excellent polish on all sides.  This fabulous specimen shows beautiful black, white, blue 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

$80.00

PR103b Here is a really great find!!  A gorgeous Ocean  Jasper Free Form from Madagascar.  It measures 3 1/4" x 1 3/4" x 4 1/2" and has an highly polished finish on all sides. It has fabulous color, lots of "eyes", crystal and cavities all  in a marvelous design!  It's very, very nice.

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The Ocean Jasper deposit, even though it was found only a few years ago, is nearly gone and the material is becoming hard to find.  The deposit formed as a Rhyolite flow but has been completely silicified. The Rhyolitic eyes or orbs come in an astonishing array of colors and color combinations. The back ground can be white, pink, green, red, or yellow. Botryoidal formations as well as white and deep green druzy are also common. This deposit was discovered at the edge of the ocean. It can only be seen and collected at low tide. The area has no road so the material must be transported to civilization by boat.  Several other types of jasper are found in that area now but the orbicular Jasper is gone.

polished rock

Ocean Jasper Free Form

$70.00

PR104b  Here is a gorgeous piece of an Amethyst geode.  This lovely piece has lots of sparkly Amethyst crystals with good color. It  measures 5 3/8" x  3 1/2" x  6 1/4" tall  with a polished and natural unpolished appearance and . Grab this one quick!

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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

$40.00

PR105b   This is a polished Free Form made of Crazy Horse Granite from the Black Hills of South Dakota (Granite from The Crazy Horse Monument Area).  This cool specimen has good color, a nice design in the rock and a polished face with balance left natural.  It measures 7"  x 5 1/4"  x 1 5/8" thick.  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

Crazy Horse Granite

$22.00

PR106b  This is a very pretty, above average quality Coconut Geode from Mexico.  It has been cut and polished on the face here at the Rock Shed to show the awesome inside design. It has a gorgeous crystal center and neat small cavity all in an interesting design.  This very pretty Geode measures 4 1/2" wide x 3 7/8" x 5 1/8".  It makes for a very interesting display piece or would make an excellent gift.

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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

Coconut 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

$70.00

PR108c Here is something we haven't seen before, an exceptional Olivine Peridot Meteorite also known as Seymchan Iron II E (Pallasite) found 1967 in Magadan, Russia . It measures 1 1/2" x 1" x nearly  1/8".  It has been cut and reveals the amazing pattern within. It also has a small bit of gorgeous Peridot truly making it one-of-a-kind item. A very nice piece indeed!

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A Meteorite is a natural object originating in outer space that survives an impact with the Earth's surface without being destroyed. There are 3 types of meteorites: stony, which are mainly composed of Silicate minerals; Iron, which are largely composed of metallic Iron-Nickel; and stony-Iron, which are composed of both types of media.

Peridot is one of the few gemstones that occur in only one color, an olive green. The intensity and tint of the green, however, depends on how much iron is contained in the crystal structure, so the color of individual peridot gems can vary from yellow- to olive- to brownish-green. The most valued color is a dark olive-green.

polished rock

Olivine Peridot Meteorite

$50.00

PR109c  This is a very nice, above average quality multi-colored Marble Mortar and Pestle.  The mortar measures 5" in diameter x  5" tall with the pestle being 1 3/4" in diameter x 5 5/8" long and weighs nearly 5 1/2 pounds.   It has a nice different Red and White 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

$36.00

PR110c  This is a very beautiful specimen of polished Brecciated Jasper Flame. The fantastic pecimen is highly polished on all sides except the bottom and has a super range of vivid colors with a very nice design.  The overall size of this gorgeous specimen is 3 1/2" wide x 2 1/4" x 4 3/4" tall. Very nice!

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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

Brecciated Jasper Flame

$65.00

PR111c  Here is something different from the gift department at the Rock Shed.  This is a very cool Amethyst Geode section with a gorgeous center from Uruguay.  The attractive and sparkly Amethyst is full of pretty purple tipped Amethyst crystals and loaded with gorgeous contrasting white Calcite cryatals. This lovely piece measures 4 1/4" x 2 7/8" x  6 5/8" 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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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

$30.00

PR112c  Here is a very beautiful polished Obsidian stone.  It measures approximately 3 3/4" x 2 3/8" x 1 1/2"  and has a good polish on all sides.  It also has some "Silversheen" as it's rotated in light. Very, very nice!

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Click here to view more beautiful Tumble Polished Rocks

Obsidian is a type of naturally-occurring glass formed as an extrusive igneous rock.  It is produced when felsic lava erupted from a volcano, cools rapidly through the glass transition temperature and freezes without sufficient time for Crystal growth.  Because of the lack of Crystal structure, Obsidian blade edges can reach almost molecular thinness, leading to its ancient use of projectile points (arrow heads), and its modern use as surgical scalpel blades.

polished rock

 Obsidian Stone

$450.00

PR113c  Here's an absolutely stunning Crystal Quartz Cluster from Columbia.  It measures 7 1/4" x 5 3/4" x 3 1/2" and has a natural finish. It has seemingly endless crystals in various sizes pointing in all direction giving it a great appearance! The crystals have exceptional clarity and "rainbow" reflections to add to it's fabulous character. DISCLAIMER: This has tons of delicate crystals and although we have had great success in shipping such delicate items it may have some smaller crystals come loose and fall off during shipping. This is unavoidable but rest assured there are still plenty of amazing crystals to enjoy.  Grab this beauty quick!

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Click here to view more amazing Crystal specimens!

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

Crystal Quartz Cluster

$180.00

PR115b   This is a very cool Poly Chrome Jasper Free Form.  Highly polished on all sides, it has an amazing range of Autumn earth tone colors all in a excellent Poly Chrome design.  This gorgeous piece measures 6 5/8" wide x 4 3/4" x 9 1/8" tall and weighs nearly 9 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

$275.00

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 Purple tipped Amethyst crystals with a good sized nicely formed  Calcite Crystal.  This lovely piece measures  10" wide x 6 1/2" x 11 3/8" tall and weighs nearly 27 1/4 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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The Rock Shed
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Keystone, SD  57751

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