Petrified Wood, Geodes, Crystals, Agates and Carvings

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$35.00 PR400b  This is a nice, above average Madagascar Agate with great color, a nice crystal center and a very unique design.  It measures 5" x almost 2 1/2" x 1 3/8" thick and has been highly polished on the face here at the Rock Shed.  This pretty agate is a beautiful work of nature and has great characteristics especially when held in the bright light.

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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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Madagascar Agate

$120.00 PR401c  This is something very different; a pretty Free Form carved from Orange Calcite. This nicely polished piece measures 3 7/8" wide x 11 3/8" tall with a great polish.  It has a deep Orange/Rust color scheme with neat inclusions and some subtle "rainbow" reflections all in a very nice design. 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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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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Orange Calcite

$80.00 PR402b  Here is something different at the Rock Shed.  This is an above average quality Poly Chrome Jasper specimen.  The Poly Chrome has been highly polished on all sides except the bottom to show the gorgeous variety of colors. It measures 3 3/4" x almost 4 1/2" x 6" tall.  Very nice!

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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

$16.00 PR403c  Here is something different for any collector.  Here is a very nice, very pretty Selenite Crystal from Utah.  This Selenite is also known as Fishtail or Angel's Wing Selenite.  It measures 4" x almost 2 3/4" wide x nearly 1 3/4" thick and has a natural shiny appearance.  A great conversation piece or use it wire wrap a new piece of jewelry.

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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. 

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Selenite Crystal

$30.00

PR404c  Here is something different here at the Rock Shed.  This is an above average quality Spinel in matrix from India.  This beauty has exceptional ruby colored crystals in the biotite matrix with an interesting shape and design.  It measures 5 3/8" wide x 2 7/8" x 3 1/4" tall and has a nice polish on the face.  This pretty piece was cut and polished here in our own Lapidary Department. Very nice!

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Spinel is the great impostor of gemstone history: many famous rubies in crown jewels around the world are actually spinels. It can be colorless, but it is usually various shades of red, blue, green, yellow, brown, or black. In Burma, where some of the most beautiful colors are mined, spinel was recognized as a separate gem species as early as 1587. In other countries the masquerade went on for hundreds of years. Spinels were most often referred to as 'balas rubies', which may have referred to their color or their country of origin.

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Spinel

$35.00 PR405c  This is a very nice, above average quality multi-colored Marble Vase. It measures 3 3/4" in diameter x 6" tall. 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.

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Marble

$50.00 PR406c   Here is something different from the gift department at the Rock Shed.  This is a very nice specimen of Iron Quartz shaped into a bowl.  This extraordinary specimen has a good color mix with fabulous inclusions and subtle "rainbow" reflections. It measures 5 3/8" wide x 4 1/8" x 2" tall and weighs nearly 1 3/4 pounds.  It has a very nice polished finish on the entire piece bringing out the wonderful character.  A perfect gift for that perfect person.

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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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Iron Quartz Bowl

$35.00

PR407b  Here is an amazing discovery!  This is an exceptionally pretty Las Choyas or Mexican Coconut and has been cut and nicely polished on the face.  This lovely coconut has a very pretty bluish grey banding around a gorgeous center with sparkling light to clear Crystals.  The lovely coconut measures 5" x 4 5/8" x almost 2 1/2" thick and weighs 2 1/2 pounds.  This Las Choyas is from Chihuahua, Mexico. Very, very nice!

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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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Las Choyas

$70.00 PR408b  Here is something different for the polished rock collector.  The very detailed Tiger Eye Skull exhibits a nice array of gold flash coloreds mixed in with the Iron oxide as it is rotated in the light with an excellent design and a great chatoyant effect.  It measures 2 7/8" long x 1 7/8" wide x 2 3/8" tall.  A very nice piece and would make a super gift for a special person!

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Click here to view more Skull carvings!

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 Skull

$150.00

PR409c  This is a very pretty, above average quality Carnelian Free Form from Madagascar.  This very cool specimen has awesome colors with Beige, Orange and lighter accents has an excellent design on each side of it with very small  natural cavities and cool crystal areas all in a fabulous design. This beautiful item measures 6 1/2" x 4 1/4" wide x 6 3/8" tall and weighs nearly 9 pounds. Close inspection shows some healed fractures, common for Carnelian.  Very nice!

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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.

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Carnelian

$160.00 PR410c  This is a great find!!  Here is an exceptional Fish carved from gorgeous Agate.  It has pretty blue to grey colors, amazing crystal cavity, fabulous banding all in an interesting design to provide unbelievable character to the appearance.  It measures 7" long x 1" wide x 2 4 1/8" tall and has a very nice polish.  This awesome specimen makes a great decoration as well as being a great gift.  Very cool!

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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.

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Agate Fish

$85.00 PR411b   Here is a very different item here at the Rock Shed.  This is a pretty Woodworthia Petrified Wood specimen from Zimbabwe.  This gorgeous piece measures over 5 1/4" x almost 3 3/8" x 3 1/4" tall and has been highly polished on the top end to show the lovely colors it is made of.   The sides are left natural showing the rough bark and how this material had seeds coming out of the bark.  This piece was cut and polished in our own Lapidary department.  A very unique and beautiful addition to any rock collection. 

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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

$28.00

PR413b  This is a beautiful natural Copper slab from from the Keweenaw Peninsula of Upper Michigan.  The beautiful specimen has been smoothed, highly polished on the top surface and then covered with a clear coat to show the gorgeous natural Copper color.  The lovely piece measures 2 3/4" x just over 2" x almost 1/4" thick and weighs 3 1/2 ounces.  Very cool indeed!

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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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Michigan Copper Slab

$18.00 PR414b  Here is something different from the Rock Shed.  This is a nice Optical Calcite specimen. The Optical Calcite has a pale peach color in normal light with more of lovely cloudy middle.  It shows bright pink colors under long wave Ultraviolet Light and measures almost 3 1/2" x 2" x 1 1/4" thick.  Something different for your polished rock 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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 Optical Calcite

$45.00 PR415b   This is a gorgeous specimen of Petrified Wood from Madagascar.   It has a beautiful dark Red colors accented by Browns, Orange and Cream on different sides or areas with a fantastic design.  This awesome piece is highly polished and measures nearly 3 3/8" x 2 3/8" wide x 4 1/4" tall .  The exceptional polish brings out the wonderful character of the wood showing the true beauty.

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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

$14.00 PR416b   This is a very pretty Amethyst healing stone from Brazil.  Amethyst is highly sought worldwide for its legendary powers to stimulate and soothe the mind and emotions.  This gorgeous piece measures nearly 1 1/4" x over 1 3/8" x 1 3/4" and is nicely shaped to fit your hand.  It has been highly polished on all sides to show the lovely Purple colors and is nearly clear with very pretty inclusions.   A very unique and beautiful addition to any rock collection. 

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Similar to like item.

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 Healing Stone

$35.00 PR420c   Here is something different from the gift department at the Rock Shed.  This is a beautiful specimen of multi-colored Fluorite from China.  The lovely Fluorite has gorgeous Pink and Purple colors with nice assortment of sparkly inclusions all in an interesting design.   It measures 4 7/8" x nearly 5 3/4" x 3 3/8" thick and has a very nice polish on the cut face.  An exceptional item for the person who has everything.

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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.

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Fluorite

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