Twinned crystals

Minerals may attract a lot of attention because of their brilliance and colours, but usually it is their often-complex shape that fascinates visitors. Twinned crystals illustrate this perfectly. They are formed when two similar crystals interact in a specific way. There are different types of twins, with different shapes. “Fishtail Twins”, “Butterfly Twins”, and “Star Twins” are just a few of the possibilities.