Crystal Varieties and Benefits:

Crystals are minerals that hold energy, and as we as humans are made up of energy, we can exchange energy with the crystal when we work with it.The Ancient Greeks assigned a multitude of properties to crystals.The first historical documentation of crystals originated from the Ancient Sumerians (c. 4500 to c. 2000 BC). The Sumerians used crystals in their magical formulas.Across cultures, different stones can symbolize or provide aide for different things. Ancient Egyptians mined for crystals and used them to make jewelry. Crystals or gemstones were also used in practice, for their metaphysical properties. Specifically, they used crystals as aids for health and protection.

A saligram, or saligrama shila is a particular variety of stone collected from riverbed or banks of the Kali Gandaki, a tributary of the Gandaki River in Nepal, used as a non-anthropomorphic representation of Lord Vishnu by Hindus. They are typically fossils of ammonite shells from the Devonian-Cretaceous period of 400 to 66 million years ago. The fossils are considered holy by Hindus because Madhvacharya received it from Vyasa, also called Astamurti, and also they resemble symbols associated with Lord Vishnu, mainly the Shankha (conch shell). Its known to a commoner as a divine stone or stones of gods. These divine stones are the shell of a worms called VajraKeeta which are found near the Gandaki river. These worms thrive on Thulasi plants. This worm has teeth as hard as diamonds, it drills the rock or stone, enters inside and stays there. 

Similarly, at Dwaraka River, a Thickly Densed , white colored material is seen. This is called as ChakraSila or Dwaraka Saligramam which is also divine and Sacred.