In Tibetan Buddhism, the five chakra system is used: crown chakra, throat chakra, heart chakra, navel chakra and root chakra. These are connected to the five Dhyani Buddhas, five archetypes of universal healing energy with the corresponding five colours: white, red, blue, yellow and green.
The minerals in this mix are especially selected for this purpose: rock crystal, red jasper, sodalite, citrin (burnt amethyst) and green aventurine.
This is a natural product, so colour, shape and size varies and may differ from the picture showed.
Precious stones and minerals are frequently used in Buddhist rituals and ceremonies. For example as offerings or to fill a stupa or Buddha statue.
