|
Page 5
|
Cost
|
Item
Description
|
|
Click Picture
for Larger Image
|
|
|
$45.00 |
M516c
Here is a very different, very beautiful light Peach and White combination
mineral. It measures 6 1/4" x 7 1/4" x 1 1/2" and has an interesting
multi-textured appearance. This mineral grouping has White Stilbite
sheaves, super cool clear Fluorapophyllite cubical Crystals resting in a Peach
colored nubby base covered by tiny White spheres. Just amazing.
Stilbite is another Silicate mineral from the Zeolite family. It
is often characterized by its sheaf like aggregates. The color is usually
white and when the cleavage is perfect, will have a distinct pearly luster.
Apophyllite, also a Zeolite, is Silicate mineral with very well
defined clear Crystals and is very popular as a collector's mineral.
The Crystal structure will refract like in obvious rainbows and can form "natural
pyramids" when tumbled.
|
Fluorapophyllite-Stilbite
|
|
|
$26.00 |
M500b
This is a beautiful dark yellow specimen of Sulpher. It measures
3" x 2" x 1" and has not been polished. It has nice sparkly
crystals. This material is from El Desierto, Bolivia. Crystals of
Sulpher are usually yellow to yellowish-brown blocky dipyramids. Also it
is found more typically as powdery yellow coatings. Native sulphur is
usually formed from volcanic action - as a sublimate from volcanic gasses
associated with realgar, cinnabar and other minerals. It is found in
some vein deposits as an alteration product of sulphide minerals.
|
Sulpher Specimen
|
|
|
$35.00 |
M515b
This is a larger, beautiful piece of Blue Kyanite from Brazil. This is a nice
specimen measuring 7 1/2" x 2 1/2" x 1 3/4" and has a very pretty shaded Blue
color. This specimen has White Quartz, with a touch of Iron Ore, embedded
in the Blue Kyanite giving the appearance an extra sparkle and shine.
Another photo.
Another photo.
Kyanite is a typically blue Silicate mineral that is commonly found
in Aluminum rich metamorphic pegmatites and/or sedimentary rock. It
is used primarily in refractory and ceramic products including porcelain plumbing
fixtures and dinnerware. It is also used in electrical insulators and
abrasives. It is definitely a collector's mineral.
|
Kyanite-Quartz
|
|
|
$24.00 |
M512b
Here is a very nice, larger piece of Rhodocrosite with several Calcite Crystals
mixed with Galena on a Limestone bed with an extra bonus of very tiny, very
sparkly Pyrite Crystals on the bottom of the specimen. It measures 3
5/8" x 3" x 1 3/4" and has a nice peach, sparkly appearance. This mineral
is from Santa Rita Mine in Peru. Rhodocrosite is a Manganese Carbonate
mineral. In its rare, pure form, it is typically a rose-red color but
impure specimens can be shades of pink to pale brown with pink as the most
common color. Rhodocrosite is often associated with Calcium, Zinc and
Magnesium. Its main use is as an Ore of Manganese which is a key component
of stainless steel and certain aluminum alloys. It is relatively soft
in formation and is very difficult to cut and therefore is rarely found faceted
in jewelry.
|
Rhodocrosite-Calcite-Galena-Pyrite
|
|
|
$44.00 |
M510b
Here is something very different for the mineral collector.
This is a nice piece of Tetrahedrite from Pachapaqui Ancash in Peru.
This specimen measures 2 1/8" x 1 1/4" x 3/4" with several smaller crystal
areas. A really neat addition to any mineral collection. Tetrahedrite
is a rare Copper antimony sulfide mineral. It is closely related to
Tennantite and other elements, most notably Iron and Zinc along with less
common Silver, Mercury and Lead. It gets its name from the distinctive
tetrahedron shaped cubic Crystals and usually occurs in massive form.
The color is steel grey to a metallic black.
|
Tetrahedrite
|
|
|
$9.00 |
M513b This
is a set of 5 very nice, hand selected Aragonite Crystals from Morocco.
Each Crystal measures approximately 1+" and have many radiating barrel
shaped Crystals protruding from them. Each Crystal has own unique shape
and color. A very nice gift or educational tool. Items will be
similar to like item. Aragonite is a Carbonate mineral that can occur
in conjunction with Calcium Carbonates. Aragonite differs from Calcite
in the formation of the Crystal shapes which can be in lattice, crystal, columnar
or fibrous in many different designs, shapes and sizes. Aragonite will
form in mollusk shells, oceans and salt water caves as inorganic precipitates
called marine cements and speleotherms. Ammolite is a form of Aragonite
with impurities that make it iridescent and valuable as a gemstone.
|
Aragonite Crystals
|
|
|
$28.00 |
M505c
Here is an interesting find. This is a very nice specimen
of Stibnite from China. It measures 1 1/2" x 2 5/8" x 1
1/4" and has a sparkly
Grey metallic color and an unique "spiky" appearance.
Another photo.
Stibnite, also known as Antimonite, is a Sulfide mineral that forms grey
Crystals. It is the most important source for the rare Metalloid Antimony.
It is used in the manufacture of fireworks, batteries, safety matches and
mascara.
|
Stibnite
|
|
|
$15.00 |
M504b
Here is a very interesting mineral
specimen of pretty Blue Calcite. It measures 3 3/4" x 2 1/2" x 1 1/4"
and has a soft opaque appearance. The mineral has a subtle Blue and
White color with a smooth, natural texture.
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.
|
Calcite
|
|
|
$25.00 |
M506c
This is something different for the
mineral collector. Here is a very nice, larger section of a Purple Amethyst
Geode. The specimen measures 4 3/4" x 6 1/4" x 2" and
has a natural sparkly appearance. This lovely piece has an array of Purple Crystals that
results in a beautiful centerpiece for any area of your home or office.
Another photo.
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.
|
Amethyst
|
|
|
$12.00 |
M502b
This is something different for
the rock collector. Here is a hollow geode pair from Las Choyas
Geode Mine in Mexico. It measures 2 1/4" x 2 1/2" and has been cracked
to see the beauty of the crystals inside.
A true wonder of nature. 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.
|
Las Choyas Geode
|
|
|
$12.00 |
M501b
Here is something different for the mineral collector. This is
a nice specimen of Wavelite on matrix. The mineral measures 2 3/8" x
2 5/8" x 1 1/2" and has a sprinkling of wavelite crystals on .
This specimen is from Arkansas. A different
mineral for the mineral collector. Chemically, Wavellite is Hydrated Aluminum Phosphate Hydroxide.
It is a secondary mineral found most often in aluminous, low-grade
metamorphic rocks. Normally it forms as radiating "starburst" clusters of
green to yellow-green crystals. It will show its fibrous structure on fracture surfaces in the matrix.
|
Wavellite
|
|
|
$24.00 |
M507b
Here is
a very nice, above average quality Smokey Quartz specimen. It measures
2 1/2" x 2 1/2" x 2" and has a natural shiny appearance.
These Crystals have been irradiated which enhances the dark smokey color. 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.
|
Smokey Quartz
|
|
|
$25.00 |
M508c
This is an interesting piece of light Gold Calcite covered with a sprinkling
of shiny, sparkly Pyrite. It measures 1" x 1 1/5" x 2 1/4" with a very
nice cubical appearance. This material is from Morocco. 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.
|
Calcite-Pyrite
|
|
|
$120.00 |
M509b
Here is a very, large specimen of a
Quartz Crystal cluster from China. It measures 7 1/4" x 6 3/4" x 2 1/2"
and has a natural shine. This specimen has a natural Citrine color and
rests on a wooden base. This very beautiful Crystal cluster has a floral-like
patterns with numerous, various sized Crystals with many complete points,
but close observation will reveal some breakage with some of the smaller Crystals.
Another photo
Another photo.
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. Crystals form when they undergo a process
of solidification. The end result may be a single Crystal, but generally
many Crystals form simultaneously which leads to a polycrystalline solid.
|
Quartz Crystal
|
|
|
$25.00 |
M514c
This is an interesting, very nice quality Zeolite
mineral! Here is a super sparkly Apophyllite specimen. This fantastic
mineral measures 4 3/4" x 3 1/4" x 2" and has a snow-like appearance.
A great way to begin your mineral collection ! This material is from
Mumbai, India. Apophyllite, a Zeolite, is Silicate mineral with very
well defined clear Crystals and is very popular as a collector's mineral.
The Crystal structure will refract like in obvious rainbows and can form "natural
pyramids" when tumbled.
|
Apophyllite
|
|
|
$12.00 |
M503b Here is a very
nice soft Rust colored Mimetite mineral. The mineral measures 2 1/2"
x 1 1/2" x 1" and has a sparkly, shiny appearance. It has some very
unique Mimetite Crystals resting on matrix. Definitely something different
to start a mineral collection.
Mimetite is an Arsenic mineral often associated with Lead, Galena, Vanadinite,
Wulfenite, Calcite and Arsenopyrite. It resembles Pyromorphite as it
falls in the same series of minerals as Pyromorphite and Vanadinite.
Mimetite is known as a collector's specimen often creating botryoidal crusts
on the the surface of the specimen. It is not used as a gemstone due
to its softness.
|
Mimetite
|
|
|
$20.00 |
M511b
Here is a very nice, but different mineral for the mineral collector.
This is a mixed mineral specimen of Conichalcite and Limonite that measures
2 1/4" x 2" x 1 1/4"and has a bright Green color. The Conichalcite rests
in a bed of Rusty Limonite and has several White to Clear Calcite Crystals
resting in the mineral.
Conichalcite is known for a sparkling green color that is hard to mistake
for any other mineral. It is often encrusted onto Limonite producing
a very colorful specimen. It is associated with Limonite, Malachite,
Adamite, Olivenite and Smithsonite.
Limonite is an ore consisting of a mixture of hydrated Iron Oxide-Hydroxide
of varying composition of minerals such as Goethite, Lepidocrocite, or Jarosite.
It has been mined with Hematite as an Ore for the production of Iron. Limonite
is heavy and has a yellow-brown color. It is often used as the pigment
ochre in many paints.
|
Conichalcite-Limonite
|
|
|
$35.00 |
M517c
Here is a nice specimen of natural Copper from Keweenaw Peninsula, Michigan.
This is natural native copper which has been removed from the matrix rock
which was surrounding it. It is the natural native copper just as it
formed in the rock. It weighs in at 1 lb and 4 oz.
Another photo.
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
|
