Crystals Tumbled

Prehnite is a silicate which is usually light green to yellow in colour. It is the first mineral to be named after someone; Colenel Hendrik Von Prehn. Prehnite rarely forms distinct crystals, usually it forms as stalactites or botroidals.
 

The name of this soft deep aqua coloured stone originates from the Greek ‘to deceive’ since it was often mistaken for other minerals. Apatite is composed of calcium phosphate, which is the same material that makes up human and animal teeth and bones.
 

Hematite is polished oxide of iron and is heavily distributed in rocks and soils. It is colored black to steel or silver-gray, brown to reddish brown, or red.

The most important mineral component of lapis is lazurite. A number of other minerals may be contained within the stone such as calcite, pyrite and sodalite.

Rose quartz is a member of the largest family of stones, the silica group, and is composed of silicon dioxide with traces of titanium. 
 

This angelite from Peru is a form of anhydrate that is blue. It is not a common mineral as it easily alters to the much more common mineral gypsum - from the addition of water to its chemical structure.

Green aventurine is translucent green quartz with chrome mica inclusions. It is often mistaken for jade. The name aventurine derives from the Italian a ventura meaning by chance.