Chrysoprase is a nickel-rich variety of quartz with distinct green coloring. Unlike other green minerals like emerald, which usually derive their coloring from chromium impurities, chrysoprase is colored by nickel—which also makes it slightly magnetic. Darker shades of green correspond...

One  1-2" aventurine specimen   Aventurine is a variety of quartz with inclusions that can cause it to have a brilliant optical effect. Nearly opaque, some translucence can be seen, especially when backlit. Inclusions in the quartz can appear as sparkles...

Obsidian is a naturally occurring, volcanic glass formed when silica-rich lava cools rapidly. This rapid cooling is why obsidian is not crystalline, and therefore not a true mineral, though it is sometimes classified as a mineraloid. Unlike intrusive minerals that...

This is one of the rarest rocks on the planet. It is a meteorite whose origin has been identified as planet Mars. Its official meteorical designation is Northwest Africa 13187. Humans have never returned samples of another planet to Earth, so Martian meteorites...

Heliotrope is a quartz variety also known as bloodstone due to small,  bright red spots that sometimes occur in it.  It is mostly dark shades of jasper or chalcedony with spots of red iron oxide inclusions.  The name heliotrope is...

One Sumatran amber specimen for your fossil collection. Images are representative of the specimen you will receive.

This listing is for the exact specimen pictured.  Weight: approximately  .71lbs   FURTHER INFORMATION: Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The term is also used for a sedimentary carbonate rock composed mostly of the mineral...

This listing is for the exact specimen pictured.  Weight: approximately  1.3lbs   FURTHER INFORMATION: Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The term is also used for a sedimentary carbonate rock composed mostly of the mineral...

A single Unakite specimen for your growing rock collection.   Please note: These photos are representative of what you will receive. Since they are all formed uniquely, please allow for variation. 

A single Apatite specimen for your growing mineral collection.      Please note: These photos are representative of what you will receive. Since they are all formed uniquely, please allow for variation.  

This listing is for the exact specimen pictured.  Weight:  .62lbs   Micas are a group of minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates. Mica is common in igneous and...

This specimen includes sphalerite and dolerite as well as some calcite and chert.   This listing is for the exact specimen pictured. Weight: .93 lbs  

A unique menilite specimen to add to your geology collection.   Photos are a representation of a similar specimen you may receive. Please allow for variation in size and color.  

Tiger’s eye is a mineral in the quartz family that is known for its optical effect, called chatoyancy. The hallmark of the effect is a linear sheen that runs perpendicular to the fibrous structure of the crystal. The silky, fibrous appearance...

Garnets are a group of minerals highly valued as gemstones in jewelry as well as industrial abrasives. It is thought it may have been named after pomegranates due to its similar color, but garnets occur in virtually all colors. Blue...

Moldavite is a type of tektite, a natural glass formed during a meteoric impact. It was created around 15 million years ago when a large meteorite hit the area of Bavaria, Germany. The melted and projected sediments traveling at high...

Banded iron formations consist of alternating layers of iron oxides and other minerals. This specimen is a variety called zebra jasper or banded jasper. As with most geological formations these are extremely old, and likely formed around 2.5 billion years...

We put this collection together with classrooms and homeschools in mind, but it can also be just for geology fans in general. This set comes in a sturdy wooden divided tray with rope handles and contains 12 sections that may hold 12 types of the...

Fuchsite, also known as chrome mica, is a variety of the mineral muscovite that forms as the aluminum (Al) atoms in the muscovite molecular structure are replaced with chromium (Cr) atoms. This slight chemical difference produces the green hue distinctive...

This rock is an intrusive igneous form called gabbro which makes up much of Earth’s oceanic crust. This rock, sometimes called “black granite” in the ornamental stone industry, helped prove the theory of plate tectonics in the 1960s. When researchers...

This rocky ball is not just a concretion of sandstone and hematite, its also evidence that water once existed on Mars. These concretions commonly form in the Southwest United States and were called Moqui Marbles by the Hopi people who...

This listing is for one specimen, ranging from approximately 26 - 54 grams. Larger pieces will be prioritized first.  FURTHER INFORMATION: Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important...

This listing is for the exact specimens pictured. WHAT IS IT Agates are rocks consisting of microcrystalline quartz called chalcedony. They are typically formed in pockets within cooled lava. As water flows though the lava, the pores in the cavities—...