$24.00

Location: Slyudyanka, Baikai Region, Siberia, Russia

$32.00

Location: Baikai Region, Siberia, Russia

$34.00

There are 2 colors of fluorite in this specimen. There is a yellowish-green and the beautiful emerald green that is highly sought after.

$88.00

This is one for fluorescent enthusiests. The fluorite fluoresces bright blue and the hyalite opal fluoresces bright green.

$12.00

A thumbnail that has great display. This classic local specimen sits on a plate of quartz and has perfect purple fluorite cubes and a small ...

$89.00

The clarity on this fluorite Cube Cluster is outstanding.

$40.00

Location: Xue Bao Diang Mnts., Sichuan, China

$3.00

Fluorite (calcium fluoride) comes in an amazing array of colors. It is commonly found in purple, blue, green, yellow, and clear, but can also occur ...

$4.95

These are nice bags of fluorite octahedrons. There are around 10 to 15 pieces per bag.

$20.00

This is a fantastic Purple Fluorite and Dog Tooth Calcite Stalactite specimen.

$98.00

This Fluorite cluster has great color, clarity, and edges! It is a beautiful blue-green color and you can see directly into the piece down to where ...

$3.00

From a rare find in the Viburnum, Trend, Missouri comes this extra-small specimen of Massive Galena (a lead sulfide), the most important ore mineral ...

$14.00

This specimen of Galena and Sphalerite is really a great piece.

$30.00

Beautiful Birthstone trees created from beautiful tumbled garnets on a natural Quartz crystal base.

$15.00

Calcite Pseudo-morphed after Ikatite.

$15.00

Calcite Pseudo-morphed after Ikatite.

$15.00

Calcite Pseudo-morphed after Ikatite.

$15.00

Calcite Pseudo-morphed after Ikatite.

$15.00

An actual leaf is covered with liquid metal that burns off the membrane of the leaf, but leaves the skeleton of the leaf intact and then ...

$15.00

An actual leaf is covered with liquid metal that burns off the membrane of the leaf, but leaves the skeleton of the leaf intact and then ...

$30.00

Beautiful Birthstone trees created from SWAROVSKI Austrian Lead Crystal on a natural Quartz crystal base. Non-Tarnish wire.

$15.00

This fossil is amazing. The color and condition are spectacular, as is the patterns in the specimen.

$3.00

Apple Green Calcite. Each piece is approx. 2"" x 2"" x 1"". Calcite is truly one of the best collection type minerals.

$80.00

Location: Angola 1, Sibindi, Cercle Nioro Do Sahel, Kayes Region, Mali

$17.00

A. Lincoln Sherk MD collected 11/12/1939

$4.00

Gypsum forms concretions of selenite blades called desert roses or sand roses, growing in sediments that are subjected to concentrated brines.

$5.00

Gypsum forms concretions of selenite blades called desert roses or sand roses, growing in sediments that are subjected to concentrated brines.

$5.00

Gypsum is a soft mineral, hydrous calcium sulfate. Gypsum is the standard for hardness degree 2 on the Mohs mineral hardness scale.

$9.00

This is a nice little piece of clear Gypsum, also known as Selenite.

$39.00

This piece has a great color contrast and looks great! There is very light, unnoticeable damage to some of the crystals.

$30.00

If you look at this very nice hematite, you will see my hand and camera reflected. That is how shiney this hematite is.

$50.00

Unfortunately in order to show the great crystal structure in the picture I had to sacrifice showing the amazing shine covering the entire piece. ...

$15.00

This Piece of Hematite Pseudomorph after Magnetite is in amazing condition.

$12.00

This Piece of Hematite Pseudomorph after Magnetite is in amazing condition.

$55.00

A superb specimen of Hemimorphite. The large spray of crystals are about 1 inch in length.

$16.00

The hemimorphite from this location are well known for their delicate clear crystals that form beautiful sprays on the limonite matrix.

$12.00

The hemimorphite from this location are well known for their delicate clear crystals that form beautiful sprays on the limonite matrix.

$14.00

The hemimorphite from this location are well known for their delicate clear crystals that form beautiful sprays on the limonite matrix.

$40.00

This is an another uncommon combination of hemimorphite in a red bed of carminite.

$15.00

The hemimorphite from this location are well known for their delicate clear crystals that form beautiful sprays on the limonite matrix.

$24.00

This is a nice specimen from the classic location at Mapimi, Mexico. The rosasite really adds nice color and contrast and displays well.

$38.00

A very unique combination of hemimorphite, conichalcite, and smithsonite. Need a loop to see the smithsonite.

$25.00

A. Lincoln Sherk MD. collection 1890s-1969

$3.00

Calcite," which gets its name from ""chalix"" the Greek word for lime", is a most amazing and yet, most common mineral.

$59.00

This is some of the most fluorescent hyalite opal that I have ever seen.

$4.00

This member of the calcite family is believed to be the navigation stone used by the Vikings to find there way on the ocean when the sun was obscured ...

$400.00

South African minerals are always a wonderful part of a great collection. This specimen has very minimal damage and would provide a nice addition to ...

$30.00

This is a very cool piece. The iridescence takes place on the defined octahedral crystals, but on the base, where the contact was, it is the usual ...

$48.00

Jeremejevite is listed as one of the 10 rarest stones on the earth.