Related Clues:
- Colourless mineral used in the manufacture of glass, abrasives and cement and as a gemstone
- Colourless rock-forming mineral
- Citrine or amethyst
- Ingredient in glassmaking
- Ground stone
- Mineral and two pints, followed by unknown quantity
- Mineral in a measure of liquid, unknown
- Proctor ___ (appliance brand)
- Stone such as amethyst or cairngorm
- The crystal in some crystal balls
- Queen gets tzar's collection of crystal
- After a couple of pints, Zoe loses old English gemstone
- Rose __: reddish mineral
- Proctor-___ (appliance maker)
- Mineral primarily a compound of 13, reduced by measure unknown