Petrified Wood, Geodes, Crystals, Agate and Carvings

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Cost

Item Description

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$65.00

PR1000c   This is a very pretty specimen of South Dakota Puddingstone.  It has a nice darker Red color on a brown background with Yellow and White accents.  The unique piece was cut and polished on the face in our own Lapidary department.  The specimen measures 3 1/2" wide x almost 3 1/4" tall x nearly 3/4" thick.  A truly different treasure.

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Puddingstone is a conglomerate sedimentary rock with an appearance like a tinted concrete but is natural. It's name comes from English settlers to South Dakota in the 1840s because it looks like Christmas pudding with cherries and currants.

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South Dakota Puddingstone

$75.00 PR1001b  Here is a unique treasure!  This is a beautiful single terminated Quartz crystal with very nice clarity and sparkly inclusions.  It measures over 4 1/8" x 2 1/4" x 2 5/8" and has a nice natural polish.  The tip has an indentation that is natural, likely where it was growing up against another crystal.  These Quartz Crystals don't photograph well to properly show the quality.  A definite must have for the polished rock collector.

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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.

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Smokey Quartz Crystal

$110.00

PR1002c   Here is a wonderful find!!  This is a very nice, larger Dugway Geode from Utah.  It measures nearly 6 3/8" x 3 3/4" x 4 7/8" and is highly polished on the face.  It has an amazing center cavity with sparkly crystals of a clear to grayish white color.  The inside cavity shows up a bright green and a little blue under short wave UV light.  The balance is left natural and not finished.  A very nice conversation piece or a pretty display item.

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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.

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 Dugway Geode

$65.00

PR1003c   Here is a very cool item!!  This is a very nice Amethyst Crystal from Brazil.  It measures nearly 3 1/8" x over 2 1/2" almost 3 7/8" tall and has a lovely rich Purple color with nice inclusions throughout.  It has a high polish on all facets with some minor dings along some of the edges and reflected in our price.  A very nice conversation piece or a pretty display item.

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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.

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 Amethyst Crystal

$70.00

PR1004c   This is an exceptional quality Quartz Crystal and Calcite cluster from China.  This unbelievable example has tiny, very fragile clear Quartz crystals all over with White to pale Pink Calcite colored crystals with near perfect points.  The sparkly crystals all rest on a lovely unidentified Green matrix that gives it all an unmatched character.  This gorgeous piece measures 6" x 2 1/2" x 2 5/8". 

Pictures cannot do this exceptional piece justice but be sure to look at all of them - click on those to the right and linked below. Just an absolutely beautiful item. 

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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.

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.

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Crystal Quartz Cluster

$8.00

PR1005b  One of the favorites of the Rock Shed returns!!!  Here is a larger, very good quality Selenite Massage Wand.  It measures approximately 6" long x 7/8" in diameter and has been hand polished.  Each end has a rounded smooth finish to prevent cuts or scrapes.  The larger size is easier to handle with either hand and works well with different hand sizes.

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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

Selenite Massage Wand

$150.00 PR1006c  This is a very pretty, above average quality, multi-colored Brazilian Agate slab.  It has been cut and highly polished to show the pretty colors in the banding and beautiful design on the inside. This exceptional Brazilian Agate slab has an awesome center with two sparkly crystal cavities surrounded by excellent banding.  The gorgeous agate slab is nearly 11 1/8" wide x 6 1/4" x 2" thick.  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.

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Brazilian Agate

$50.00 PR1007c  This is a great find!!  Here is an above average quality specimen of Labradorite.  It measures over 4" x 2 3/4" x 2 1/8" and has a good polish.  This specimen has a fascinating color mix with a highly iridescent shine and has some areas of Biotite Mica that show up dull black. This would make a great gift for the "hard to buy for" person.

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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.

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Labradorite

$100.00 PR1008c   Here is a very nice multi-colored Mexican Lace Agate from an unknown location in Mexico.  This beauty has a unique design and appearance in the different colors in the excellent lace banding ranging from white and cream to various grays with different red and orange accents in the banding.  It measures 10 5/8" wide x 4 7/8" x 1/2" think, weighs 1 3/4 pounds and has a very nice shine on the cut face.   A great item to add to your polished rock collection.

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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.

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Mexican Lace Agate

$30.00 PR1009c  This is a nice, above average quality South Dakota Prairie Agate.   It measures 4 1/2" x 3 3/8" x nearly 1 3/8" and was polished on all sides here at the Rock Shed.  This cool Agate has lots of Prairie Agate banding with a pretty Yellowish Cream, Grey, Brown and Black accent colors.  A nice display piece for your collection.  Very nice!

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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.

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SD Prairie Agate 

$50.00

PR1010c   This is a very nice Tee Pee Canyon Agate from Custer, South Dakota.   It measures 4 7/8" x nearly 4" x 2 1/8" and is highly polished on the face.  This gorgeous Agate has excellent agate designs with excellent banding in the various Red colors all on a earth tone background.  It has been polished in the Rock Shed's own Lapidary department.  A stunning display piece for your collection.  Very beautiful!

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Click here to see more Fairburn and Prairie Agates

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.

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Tee Pee Canyon Agate

$20.00

PR1011b   This is a very pretty, larger desert Selenite specimen from Morocco. This specimen measures nearly 8 3/4" x 9 1/4" x 2 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.

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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

Selenite Desert Rose

$30.00 PR1012b  Here is an above average quality specimen of Petrified Wood Slab from Indonesia.  It has been highly polished on both sides and measures 9 1/8" wide x nearly 6 3/8" x 5/8" thick.  The wood has a nice blend of Earth tone colors and has an interesting irregular shape and design.  This pretty Petrified Wood Slab is a very nice specimen for any collection.

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Click here to view more Petrified Wood specimens!

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.

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Petrified Wood

$16.00

PR1013b   Here is a very cool Rainbow Calcite Free Form from Mexico.  It has many crystals in various shades light Peach, Raspberry, Green colors with Cream, White and nearly clear sparkly accents.  It measures 4" x almost 3 1/2" x 3 1/4" and has a nice polish.  A very unique gift for someone special or add it to your own collection.

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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.

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Rainbow Calcite

$30.00

PR1014b   Here is a very cool item!!  This is a very nice Splash Copper specimen from Upper Michigan.  It measures 5 1/2" x 2 1/2" x almost 2 3/4" and has a lovely copper color throughout.  A very nice conversation piece or a pretty display item.

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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.

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 Splash Copper

$24.00 PR1015b  Here is a rare and interesting treasure!  This is a highly sought after Moldavite crystal with a unique shape.  It measures 7/8" x 5/8" x 3/8" thick and has a natural finish on the lovely dark green color.  It would make an excellent piece for wire wrapping for jewelry or just for your collection. 

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Moldavite is an olive-green or dull greenish vitreous substance possibly formed by a meteorite impact.  It is one kind of tektite found only in the Czech Republic. Moldavite is also known as the Grail Stone, as it is believed to have been the green stone in what is known as the Holy Grail.  During the Middle Ages, only those who were considered royalty or the highest nobility, wore jewelry fashioned out of moldavite.  Moldavite has historically been used in tool making, as well as being displayed in pendants and as heads of walking canes in Central Europe.

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Moldavite

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