In Hindu Shiva temples, Saiva Agamas(Shaivism's Agamas) allows worshiping Lord Shiva in the form of Sphatika Lingam or Crystal Lingam. The Saiva Agamas says one can worship this Great God Shiva in the form of a Lingam made of mud or sand, of cow dung or wood, of bronze or black granite stone. But the purest and most sought-after form is the quartz crystal (Sphatika), a natural stone not carved by man but made by nature, gathered molecule by molecule over hundreds, thousands or millions of years, grown as a living body grows, but infinitely more slowly. Such a creation of nature is itself a miracle worthy of worship.