Herkimer diamonds

Prized for their clarity, these double-pointed crystals have some fascinating bubbles trapped inside!

Carnelian

Ranging from pale yellow to deep orange-red, this semi-precious stone was a popular choice in Victorian jewellery

Fluorite – a frozen rainbow

Fluorite is like a rock-collector's psychedelic dream, because it's found in a rainbow of colours from red to deep purple. …

Amethyst

Did I ever tell you that I love rocks? How did you guess? I'm taking a closer …