Citrine is a type of quartz. When it forms naturally, it may have a blend of other crystals with it such as ametrine (amethyst and citrine). It ranges in color from a pale yellow to a deep amber. One thing I have noticed about citrine is that it very often has rainbows within it. That is a small area where there is an inclusion. When the light hits it just right, you will see a tiny rainbow. This is one of my favorite stones for that reason.
It is easily found in many forms and price ranges. It’s most common form is natural points, tumbled or small clusters and it is quite inexpensive. It can also be found as geodes and cathedrals. It cathedrals are large geodes that are lined with thousands of little citrine points. The cathedrals are extremely expensive and are treasured by gem collectors.

It is very popular for jewelry.