Petrified Wood, Geodes, Crystals, Agates and Carvings

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$400.00 PR708c   Here is something very special for a polished rock collector.  This is an absolutely gorgeous Labradorite Free Form.  This extraordinary specimen has a good color mix with a highly iridescent "blue" shine that changes as the light hits it from different angles. It measures approximately 10" wide x almost 9" tall x over 4 3/4"  and weighs nearly 17 pounds. An exceptional item that cannot be duplicated!

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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

Labradorite

$26.00 PR709b   Here is a very nice, above average quality Black Skin Agate free form.  It measures nearly 3 1/2" x almost 2 3/4"  x over 1 1/2" and has an excellent polish on all sides.  This specimen has a unique design, colors and patterns found only in Black Skin Agates. Just a beautiful piece.

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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.

black skin agate

Black Skin Agate

$15.00 PR711b  Here is something different from the gift department at the Rock Shed.  This is a larger, hand crafted Soapstone Box with inlaid Abalone shell design.  It measures 5 1/8" x over 1 3/8" and has a smooth finish.  The box has a removable lid with an intricate hand carved floral design on each side.  The inlay Abalone shell design has a pretty Pink and Blue floral pattern.  The lid does have some light scratches near the flower and is reflected in our price. A perfect gift for that perfect person.

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Soapstone, also known as Steatite or Soaprock, is a metamorphic rock or Talc-Schist.  It is composed of the mineral Talc and is rich in Magnesium and is formed by the metamorphism of ultramafic protoliths and the metasomatism of siliceous Dolostones.  It is a very soft material and may have a soapy feel when touched.  It can be easily carved into decorative items as well as bowls or other cooking utensils.  It is used by welders and fabricators as a marker due to its resistance to heat.

soapstone box

Soapstone Box

$50.00 PR713b   Here is a very beautiful portion of a large Dugway Geode. The inside of the cavity is lined with fine druzy Quartz Crystals with a hint of Lavender color. It measures 6 1/2" wide x over 7" tall x nearly 5 1/2" and has a natural unpolished surface.  This cool specimen has unique design, colors and patterns found only in Dugway Geodes. Just a beautiful piece of nature!

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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.

geode

Dugway Geode

$40.00 PR702c  Here is a very pretty Carnelian Agate Free Form.  It measures approximately 3 1/2" x 2 7/8" x 1 3/4" and has been nicely polished.  It has a colorful reddish orange background and dark red accents in a very unique pattern.  A very beautiful addition to any rock collection. 

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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.

carnelian free form

Carnelian Agate Free Form

$120.00 PR710c   This is a very nice polished End Cut from an Utah Septarian Nodule.  It measures over 7 1/4" x over 6 1/2" x 4 1/8" and weighs nearly 8 pounds. This one has lots of Brown Aragonite with contrasting Yellow Calcite and a very cool crystal cavity. Septarian nodules are rather difficult to find now, so grab this one while you have the chance.

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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.

septarian end

Septarian End Cut

$40.00 PR707c   Here is something different from the gift shop at the Rock Shed.  This is a very nice, above average quality Mexican Coconut Geode half.  It measures nearly 5" x almost 4 7/8" x 2 1/8" with a natural, rough texture on the outside.  The edges of the face are nicely polished. The inside reveals very nice Smokey Quartz colored Crystals with a hint of lavender.  Very beautiful indeed.

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

mexican coconut geode

Mexican Coconut Geode

$60.00

PR705c  This is a very nice specimen of natural, native "Halfbreed" Copper and Silver  from Houghton County, Michigan.  It measures nearly 1 3/4" x 1 1/4" x nearly 1/2" and has a natural rough exterior. A great addition to any collection or a super gift.

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Click here to view  more Copper/Silver specimens !!

Copper is a reddish colored metal with a high electrical and thermal conductivity.  It has its characteristic color because it reflects red and orange light and absorbs other frequencies in the visible spectrum due to its band structure.  It is in the same family as Silver and Gold and is a malleable metal.  It is beautiful natural or polished.

copper nugget

Copper Nugget

$75.00 PR704b  Here is something rare and different for the polished rock collector.  This is a very nice, above average quality Dry Head Agate End Cut from Montana.  It measures almost 4" x 3 3/8" x 1 3/8" with a nice front face polish.  This Agate has a very nice agate design and beautiful blend of Earth tone colors. It has a nice deeper Crystal cavity and two other smaller cavities.  Definitely a keeper. 

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Dry Head Agates are from the Bighorn Canyon area of Montana. The banding colors are usually bright orange with some white or pink bands on charcoal, light gray, whitish oranges or greenish matrix. Dry Head Agates are very rare and no longer available as the mining area is now part of a wild horse refuge. Dry Head Agates may be geologically similar to the Teepee Canyon and Fairburn Agates of the Black Hills area.

dry head agate

Dry Head Agate

$50.00 PR712b  Here is an amazing discovery!  This is a Sikhote-Alin Meteorite from Primorskiy Kray, Russia that fell on Feb 12, 1947.  It measures 1 1/8" x nearly 1 1/4" x  nearly 5/8" and has a natural sheen.  This Meteorite has a Black metallic finish.   These Meteorites are special in that they have "finger print" marks on the surface which are the result of the melting of the material upon entering the atmosphere from outer space. A cool gift or just keep it for yourself.

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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.

meteorite

Sikhote-Alin Meteorite
 

$14.00
 

PR700b  Here is a very nice, above average quality Black and White Marble Massage/Healing stone.  It measures 2 3/4" x 2 1/4" x 1 7/8" and has a nice polish.  The specimen has a rounded design that fits comfortably in your hand to use for massage.  You may just want to use it as a paper weight or conversation piece.  It is truly beautiful and has a great polish.

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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.

massage stone

Marble Massage Stone

$16.00
 

PR706c  Here is a very nice, unique Pakistani Onyx hand crafted bowl.  It measure 5" in diameter and 1 1/4" in depth with a nice polish on all sides of the bowl.  Each bowl is different and has its own beautiful design and color scheme.  Although the photo shows 3 bowls, you will received one (1) of our choice as it comes from the box.

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. 

bowl

Pakistani Onyx Bowl

$25.00
 
PR703c   This is a very nice end cut of  Petrified Wood from the Black Hills of South Dakota. This piece was cut and polished in our own lapidary department. It has nice rich brown Earth Tone colors and a neat natural texture on the unpolished surfaces. It measures 4 1/2" x over 5" x 2" and has a smooth, highly polished face.  This beautiful Petrified Wood is unique and would enhance any table or desk top and would be a cool gift!

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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.

petrified wood
 

South Dakota Petrified Wood

$50.00
 
PR701b  This is a very pretty, above average quality, multi-colored Brazilian Agate.  This cool specimen measures 3 1/8" x 2 5/8" x 1 3/4" and has a nice polish on one side.  It has a great design, various beautiful Tan, Grey and Reddish Brown colors and a nice cavity that goes all the way through.  It makes for a very interesting display piece or would make a nice gift.

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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.

agate

Brazilian Agate

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The Rock Shed
515 1st Street
Keystone, SD  57751

Hours: Monday - Saturday 9:00 AM to 6:00 PM
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