Purple Quartz is not a naturally occurring mineral, but it is a variety of quartz that is created by heating Amethyst (purple variety of quartz) at a high temperature, which causes the iron in the This process is permanent and does not change the chemical composition of the stone.
This type of purple quartz is also known as Lavender Quartz, and it's considered as a treated mineral, not a natural one. It is not found in nature in this specific purple color, it is created by human intervention.