hyalite
/ˈhaɪəlaɪt/
noun
- A clear, glassy variety of opal that looks like colorless glass or ice.
- Hyalite is sometimes called 'Müller's glass' because of its transparent appearance.
- Collectors prize hyalite for its unusual, water-clear look.
- The jeweler showed me a beautiful piece of hyalite that sparkled like frozen water.