About Rock Crystal

The transparent, colourless variety of quartz is still known as rock crystal. Long ago, people believed that rock crystal was a compact form of ice: in fact 'crystallos' means 'ice'.
The best rock crystal has the clarity and shimmer of water. Although colourless quartz is relatively common, large flawless specimens are not, which is why crystal balls these days are made of glass, not quartz. Rock crystal has often been used in jewellery, particularly carved pieces.

Facts:

• Mohs Hardness: 7
• Mineral: Quartz