Barite is a common mineral and makes very attractive specimens. Barite often is an accessory mineral to other minerals and can make a nice backdrop to brightly colored crystals ...

Bentonite is a highly absorbent clay-like substance that helps to lift impacted waste matter which has accumulated on the walls of the gastrointestinal tract ...

Dolomite, which is named for the French mineralogist Deodat de Dolomieu, is a common sedimentary rock-forming mineral that can be found in massive beds several hundred feet thick. They are found all over the world and are quite common in sedimentary rock sequences ...

Gilsonite is a natural, resinous hydrocarbon. This natural asphalt is similar to hard petroleum asphalt and is often called a natural asphalt, asphaltite, uintaite, or asphaltum. Gilsonite is soluble in aromatic and aliphatic solvents, as well as petroleum asphalt ...