This section of our website features quartz with inclusions, also known as included quartz, and varieties not classed as 'Colourless Quartz'.
Although inclusions in quartz are relatively common, the two most popular varieties are rutilated and tourmalinated quartz.
Different minerals and substances can become trapped during the crystal's early formation. As it grows, these materials become inclusions.
An inclusion can be virtually anything, but water, petroleum, and gas are the most common.
When present in abundance in colourless quartz, inclusions can change the crystal's colour and create interesting patterns and optical phenomena.
Chatoyance, aventurescence, schiller, and asterism are optical phenomena caused by inclusions.