Petrified Wood, Geodes, Crystals, Agates and Carvings

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$18.00

PR700b  Here is an excellent example of top quality Fluorite from Madagascar. This brilliant specimen has a gorgeous deep Emerald Green color loaded with very cool "cubed" shape crystal.  It  measures 2 7/8" x 2 1/8" x 1 1/2"  and has not been polished.  Just plain wonderful!!
 

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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

$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.

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Brazilian Agate

$125.00 PR702b  Here is a fabulous Petrified Wood Free Form from Madagascar.  It has an awesome array of colors ranging from reds to tan and gray in a wonderful design from any any angle or direction..  It measures almost 4 1/2" at the widest x nearly 3 7/8" x 5 3/4" tall and has been nicely polished on all sides except the bottom.  Close inspection shows some healed fractures, common for this material.  A very 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 Free Form

$28.00 PR703b   This is an exceptional specimen of a Nebraska Chalcedony or often called Nebraska Blue Agate from western Nebraska.  It has nice dark grey to black Earth Tone colors with blue hidden highlights and a neat natural texture on the unpolished surfaces.  It exhibits a bright Green under SW/UV light and a dark green under a LW/UV (as seen in last photo).  The pretty agate measures 6" x 3 1/4" x 2 5/8" thick and has a smooth highly polished face.  Nebraska Blue Agates are no longer available from where they were originally found.  This wonderful example was cut and polished in our own lapidary department.  This beautiful Blue Agate is unique and would enhance any table or desk top and would be a cool 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.

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Nebraska Blue Agate

$75.00 PR704c  Here is something rare and different for the polished rock collector.  This is a very nice, above average quality Dry Head Agate from Montana.  This Agate has a very nice agate design and beautiful blend of Earth tone colors.  The beautiful Dry Head Agate has gorgeous tight banding on different sides.  It measures 3 1/8" x almost 3 1/8" x 2 3/4" thick with a nice polish on all sides.  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.

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Dry Head Agate

$55.00 PR705b  This is an amazing Carnelian Free Form from Madagascar with lots of character unique to this material.  This very cool item has darker background colors with Creamy accents and has an excellent design on each side of it.  Look at all the different views as each has character all it's own.  Close inspection shows some healed fractures, common for Carnelian.  This beautiful Free Form measures 5 1/4" x 3" x nearly 2 1/8" and weighs over 1 3/4 pounds.  A great addition to any collection or a super nice gift.

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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

$22.00

PR706b  Here is a very nice, unique Pakistani Onyx hand crafted bowl.  It measures 6" in diameter and 1 1/2" approximately deep 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.

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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. 

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Pakistani Onyx Bowl

$25.00 PR707c   Here is something different from the gift shop at the Rock Shed.  This is a very nice, excellent quality Mexican Coconut Geode half.  The inside reveals nice sparkly faint light purple tinted Quartz Crystals in the middle of the very pretty center cavity.   The face where the geode was cut open is highly polished.  It measures 3 3/4" x 3 3/8" x  2 1/8" thick with a natural, rough texture on the outside.  Very beautiful indeed.

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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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Mexican Coconut Geode

$135.00 PR708b   Here is something very special for a polished rock collector.  This is a gorgeous Labradorite Dish.  This lovely dish has a good color mix with a highly iridescent "blue gold" shine that changes as the light hits it from different angles. It measures 6 7/8" x 5 5/8" x 1 5/8", weighs nearly 4 pounds with a very good polish on all sides.  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.

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Labradorite Dish

$75.00 PR709b   Here is an exceptional 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 8 1/4" wide x 5 7/8" tall x 4 3/4" thick, weighs nearly 8 3/4 pounds and has a nice shine and polish on the cut face. This is another fabulous creation from our very own Lapidary Department.  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 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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Mexican Lace

$175.00 PR710b  This is something different for the polished rock collector.  Here is an exceptional  large polished slab mounted on a stand cut from a specimen of Brazilian Agate.  It measures approximately 8 1/2" wide  x 10 1/2" tall (12 1/2" with stand)  x 2  1/2" thick weighs nearly 11 3/4 pounds and is polished on one side.  This beautiful piece has a crystal cavities, amazing banding with a great Agate design throughout. It's actually much darker than appears in the photo. Just gorgeous!

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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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Brazilian Agate

$110.00 PR711c  Here is something different from the gift department at the Rock Shed.  This is a larger, very lovely free form display cut from a large Madagascar Agate.  It measures almost 3 5/8"  x nearly 4 3/8" wide x 6" tall and has a good polish on the face.  The gorgeous piece has awesome colorful banding agate designs on two sides and is incredibly beautiful.  A perfect gift for that perfect person.

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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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Madagascar Agate

$90.00 PR712b  Here is an amazing item!  This is a very beautiful, above average quality, Smokey Quartz Crystal.  The larger Crystal has good clarity throughout with sparkly inclusions.  The lovely Crystal has very nice facets and a good polish.  The awesome Smokey Quartz crystal measures nearly 5" laying down x almost 3 1/8" x 2 3/8".  Quartz crystals usually don't photograph well and this very nice example is no exception.  A cool gift or just keep it for yourself.

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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

$55.00 PR713b Here's a unique treasure! This is a lovely high quality Amethyst Free Form from India. This fantastic piece has gorgeous Purple Amethyst in a neat shape. It has great clarity, fabulous inclusions, subtle "rainbow" reflections, Agate banding and a very unusual and amazing open cavity with lots of sparkle. It measures approximately 3 3/8" x  2 1/2"  x  3 3/4" tall.  Grab this beauty quick!

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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 Free Form

$40.00 PR715b  This is a unique Vase made from Chinese Marble.  This multi-colored vase has a nice blend of Burnt Sienna, Cream, Green, Grey and dark Green with a nicely polished finish except for the bottom.  It measures nearly 6 3/4" tall x 3/8" in diameter and weighs over 2 1/4 pounds.  A very nice addition to any polished collection or it would make a great gift.

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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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Marble Vase

$85.00 PR716b  Here is a different and amazing item!  This is a very beautiful  Anhydrite standup.  The lovely standup has an awesome array of fabulous  purple and pink colors in a mesmerizing design with a good polish, tons of sparkling flash and "rainbow" reflections.  The awesome specimen measures 3 1/4" x 2 1/8" wide x 4 1/4" tall. A perfect gift for that perfect person.

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A member of the evaporite group of minerals and the soft rock comprising anhydrite formed by precipitation of calcium sulfate from evaporation of seawater. Anhydrite can also form through the dehydration of gypsum, another sulfate mineral found in evaporites. Anhydrite may occur as a cap rock above salt domes.

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Anhydrite Stand Up

$60.00 PR718c   Here's something we haven't seen before, a gorgeous Flower Agate Flame from Madagascar. It measures 3" x 2 3/4" x  4 5/8" tall.  It has all the features of an Agate in the pastel grey background with neat banding and orange highlights with the added surprise of "flowers" bursting throughout. This is truly a treasure so grab it quick!

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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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Flower Agate Flame

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