Petrified Wood, Geodes, Crystals, Agates and Carvings

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$65.00 PR900b  This is a very pretty, above average quality, multi-colored Peacock Marble Vase from China.   It has a very nice mix of various colors with nice highlights.  This lovely Vase measures 5" in diameter x 7 3/4" tall.  It is highly polished all around except for the base. 

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Peacock Marble is from Southwest China and formed in Limestone by heat and pressure in the earth's crust. Recrystallization during Himalaya formation caused the limestone to change in texture and makeup. Fossilized materials along with it's original carbonate minerals, recrystallized and formed large, coarse grains of calcite. Impurities present in the limestone during the recrystallization affected the mineral composition of the marble.  The minerals that result from the impurities give the marble up to ten different colors. The corresponding colors and minerals that can be found: Green - Serpentine; Purple - Manganese spar; Brown - Iron; Gray - Silicon Dioxide; Red - Hematite; Orange - Iron; White - Calcite; Violet - Iron Manganese; Yellow - Limonite; Blue - Copper, Cobalt, Chromium; Black - Carbon, Iron, Manganese. Peacock Marble is also called "seven color Jade" in local language.

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Peacock Marble Vase

$135.00 PR901c  Here is a great addition to your office or home.  This is a beautiful Madagascar Jasper Pyramid.  It measures 5 3/4"square at the base x 3 3/4" tall and is polished on all sides.  This specimen has a lovely color scheme of various  greens with lots of accents in an interesting design found only in Madagascar Jasper.  Definitely something different and very eye-catching for the polished rock collector.

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Jasper, or spotted stone, is an opaque, impure variety of Quartz that is usually red, yellow or brown in color.  Some Jaspers simultaneously exhibit several variants such as banding, flow patterns, dendrites or color variations.  This results in what appears to be scenes or images in a cut section of the Jasper.

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Madagascar Jasper Pyramid

$40.00

PR902c   Here is a beautiful polished piece of Black Skin Agate. This interesting specimen has amazing banding with an excellent blend of different Greys, White,  Tans and Dark Brown colors in a nice design.   This wonderful piece measures 3 5/8" x 3 1/8" x 2" and is highly polished on all sides.  A very nice addition to any 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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Black Skin Agate

$150.00 PR903b   This is a beautiful polished Septarian bowl from Utah.  It has fantastic Yellow Calcite contrasting the Brown Aragonite in a nice design.  It measures 11 3/4" x 6 1/2" x 2 1/4" thick, weighs over 8 pounds and is highly polished both sides leaving the outer sides in it's natural unpolished state. A truly fabulous piece made in the USA!

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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.

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Septarian Bowl

$140.00 PR904c  Here's a cool new item. A very lovely, very high quality Purple Amethyst Crystal Point with very sparkly accents.  This beautiful polished Amethyst crystal point has very rich Purple color with fabulous inclusions and "rainbow" reflections.  The cut edges are left natural and unpolished.  It measures 4 5/8" x 4 3/8" x 3 1/2"; weighs nearly 3 pounds and has a super sparkly-shiny appearance.  Just plain exceptionally nice!

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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

$85.00 PR905c  Here is a very nice, above average quality, Citrine Crystal specimen from Brazil.  The exceptional crystal cluster measures 7 1/2" x 5 1/2" x 5 1/8"; weighs nearly 6 3/4 pounds and has naturally sparkly  Honey Gold color.  This true beauty was part of a larger Geode that was broken down to show the inner Crystals.

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Citrine is any Quartz Crystal or cluster that is yellow or orange in color.  Most Citrine, usually begins as Amethyst which becomes yellow due to heat treatments.  True Citrine is often rarer but is hard to distinguish from the heat treated variety.  It is widely distributed as a mineral, but fine, clear specimens that are suitable for cutting as ornamental stones.

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Citrine

$100.00 PR906c  Here is a gorgeous large  piece of Petrified Wood from Arizona. The lovely specimen has Brown and Red colors with Tan accents. The exterior is left natural with outstanding character of the textures with a nicely polished front face. It measures 10 1/4" x 8 1/4" x 3 3/4" and weighs over 15 pounds. This is a unique, very interesting, one-of-a-kind creation from our very own Lapidary Department to keep for your own or give as a 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.

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Petrified Wood

$70.00

PR907c   This is a beautiful polished free form of Tiger Eye.  This gorgeous specimen exhibits a nice array of gold flash colors mixed in with the Iron oxide as it is rotated in the light.  It measures nearly 4 1/8" x 2 5/8" x almost 2 3/8" thick; weighs nearly 1 3/4 pounds and was highly polished on all sides here at the Rock Shed.  An excellent paperweight or conversation piece for your collection!

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Tiger-eye is a member of the quartz family, a cryptocrystalline variety. It is one of the chatoyant varieties of gemstones. Due to the fibrous structure of the gemstone, as light reflects within the thin parallel fibrous bands it exhibits a changeable silky luster or chatoyancy. It occurs naturally in colors of gold and blue.

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Tiger Eye

$100.00 PR908b  This is something really different for the polished rock collector!!  Here is an above average quality Lapis Free Form.  It has lots of sparkly Pyrite scattered about the rich Royal Blue color.  It measures nearly 4 5/8" x 2 7/8" x 1 5/8" thick and has been highly polished on all sides.  This gorgeous Lapis specimen makes a very unique gift or add it to your collection.

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Lapis is a stone with a long tradition of being considered a gem.  It is usually deep blue in color and is opaque.  It is a rock and not a mineral as it is made up from various other minerals.  The main component is Lazurite which is a Feldspar Silicate.  Lapis may also contain Calcite, Sodalite and Pyrite.  It is found worldwide.

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Lapis Free Form

$25.00 PR909b  Here is something we don't see every day, a fabulous Agate from the wild Prairie of South Dakota. It measures 5 1/4" x 5 3/8" x 1 7/8" with a very nice polish on the cut face with the balance left natural. This gorgeous creation was cut and polished right here in our very own Lapidary Department. It has a great mix of colors neat banding in an unusual design specific to that of an Agate.  Definitely some thing different for the polished rock collector.

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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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South Dakota Prairie Agate

$180.00 PR910c  Here is a beautiful Amethyst Point from Brazil.  This very appealing Amethyst specimen has wonderful Purple colors on the different sized crystals in different places with subtle "rainbow" reflections.  It measures 10 1/4" x  4 5/8" x 3 5/8" with a great polish on the point tips leaving the rest of the crystal in it's natural state. Very nice!

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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.

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Amethyst Point

$60.00

PR911b   Here is something different from the gift department at the Rock Shed.  This is a very nice specimen of Youngite from Wyoming.  It measures 6 3/4" x 3 1/2" x 2 3/4" thick and has a nice botryoidal quartz druzy finish on the natural exposed parts. The Youngite has been not polished and varies in color from tan to grey to a reddish tint in other areas. This Youngite specimen is very colorful and shows a very pretty blue-green under short wave UV light.  An outstanding addition to any polished rock collection.

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Youngite is an Agatized Brecciated Jasper with a grayish translucent druzy quartz around the outside of the material. The druzy quartz usually fluoresces green. The Jasper center color varies from tan to peach, brown, reddish and salmon. Youngite is used in making gemstone beads or cabochons and is very hard.

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Youngite

$140.00 PR912c   Here is an exceptional Landscape Quartz Crystal with tons of character.  This awesome beauty measures 3" x 1 1/2" x 1 3/8" and has excellent clarity throughout the crystal showing the incredible inclusions,  golden Rutiles and an extraordinary Chloride Crystal. This beautiful Crystal has a wonderful shape with a high polish to reveal it's hidden beauty. Quartz Crystals don't always photograph well to properly show the gorgeous quality.  Very nice!

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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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Landscape Quartz Crystal

$75.00 PR913c  Here is something different from the gift shop at the Rock Shed.  This is a very nice, above average quality Agate from Brazil.  The face has been highly polished.  It measures 9" x 3 7/8" x 4 3/4" with a natural, rough texture on the outside. This is a unique, very interesting, one-of-a-kind creation from our very own Lapidary Department to keep for your own or give as a 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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 Agate

$30.00 PR914c  This is pretty Pakistani Onyx carved into a lovely  shaped vase.  This nicely polished piece measures 3 5/8" in diameter x 5 3/4" tall with a great polish.  It has a good color scheme with a very nice design.  This unique item would make a great gift or nice addition to any polished rock collection.

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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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Onyx Vase

$60.00 PR915c  This is something very different; a pretty bowl carved from Poly Chrome Jasper.  This nicely polished piece measures 4 5/8" wide x 4 1/4" x1 1/2" tall  with a great polish.  This specimen has a lovely color scheme of various colors in an interesting design found only in Poly Chrome Jasper. This unique item would make a great it would make a great gift or nice addition to any polished rock collection.

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Jasper, or spotted stone, is an opaque, impure variety of Quartz that is usually red, yellow or brown in color.  Some Jaspers simultaneously exhibit several variants such as banding, flow patterns, dendrites or color variations.  This results in what appears to be scenes or images in a cut section of the Jasper. 

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Poly Chrome Jasper

$45.00 PR916b  Here is a rare and interesting treasure!  This is a highly sought after Gem quality Colombianite Tektite from Colombia with a unique shape.  It measures nearly 1" x 7/8" x  5/8" and has a natural finish. Hold it up to the light and witness how this very dark Gem illuminates. Amazing!

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Colombianite or Tektite is a sacred stone of the Colombian Indians from the Muisca tribes. Natives call this stone Piedra Rayo which means Stone of Lightning or Light Stone. It is used in spiritual rituals and is much rarer than Moldevite and Saffordite.

Tektite are gravel-sized bodies composed of black, green, brown or gray natural glass formed from terrestrial debris ejected during meteorite impacts.

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Colombianite Tektite

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