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: .29 lbs WHAT IS IT Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). Over 800 forms of calcite crystals have been identified. Most common are...

This listing is for the exact specimen pictured. Weight: .66 lbs WHAT IS IT Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). Over 800 forms of calcite crystals have been identified. Most common are...

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 Lapis Lazuli specimen for your 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 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 listing is for the exact specimen pictured.  Weight: 215g Smoky Quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray or black crystal. Like other quartz gems, it is a...

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

This listing is for the exact specimen pictured.  Weight: 335g  WHAT IS IT  Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and...

This listing is for the exact specimen pictured.  Weight: 240g WHAT IS IT  Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6). Colored green by trace amounts of chromium and/or sometimes vanadium. Beryl has a hardness of...

This listing is for the exact specimen pictured.  Weight: 350g WHAT IS IT  Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6). Colored green by trace amounts of chromium and/or sometimes vanadium. Beryl has a hardness of...

This listing is for the exact specimen pictured. Weight: 3.64 lbs WHAT IS IT Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). Over 800 forms of calcite crystals have been identified. Most common are...

This listing is for the exact specimen shown.  Weight: 115g WHAT IS IT Chalcedony is a cryptocrystalline form of silica, composed of very fine inter-growths of quartz and moganite. These are both silica minerals, but they differ in that quartz has...

This listing is for the exact specimen shown.  Weight: 10g  

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...