Gemstones and crystals use as healing methods since the beginning of human history. Pranic healers in the Himalayas use crystals such as Amethyst to activate 3rd eye chakra. Mainly crystal healing uses the color of chakras to change our life to positive levels. In astrology, we use gemstones and certain crystals to energize weak planets.
Sapphires and rubies are fancy color stones that people use for jewelry and in Vedic Astrology, they are commonly used as remedies for planetary malfunctions. Sri Lanka is a country of gemstones called the Land of Blue Sapphires.