These coloured calcite geodes combine a dark black-rock exterior with yellow calcite inside. Each piece offers the simple geological pleasure of an unassuming surface giving way to a more noticeable interior.
Display the geodes together in a mineral collection, arrange them on a shelf or use them as a starting point for looking more closely at colour, texture and crystal formation. Their contrast makes them especially easy to pick out among other stones.
They also work well as conversation pieces. Compare the shapes and surfaces of individual geodes, or use them in a sorting and observation activity centred on natural materials and the different ways rocks can look.
A closer look at calcite geodes
Calcite is a mineral that can form crystal-filled cavities in rock. These pieces have been coloured, giving the yellow interior a stronger visual relationship with the black-rock exterior. In crystal collecting, geodes are valued for the surprise between their outer shell and inner surface.
- Coloured calcite geode
- Black-rock and yellow colour combination
- Suitable for mineral displays and collections
