- of Hush - The process of washing ore, or of uncovering mineral
veins, by a heavy discharge of water from a reservoir; flushing; --
also called booming.
- Native sulphate of barium, a mineral occurring in
transparent, colorless, white to yellow crystals (generally tabular),
also in granular form, and in compact massive forms resembling marble.
It has a high specific gravity, and hence is often called heavy spar.
It is a common mineral in metallic veins.
- Blue stone: lapis ... - Gem, lapis ... - Stone, lapis ... - A mineral of a fine azure-blue color, usually in small
rounded masses. It is essentially a silicate of alumina, lime, and
soda, with some sodium sulphide, is often marked by yellow spots or
veins of sulphide of iron, and is much valued for ornamental work.
Called also lapis lazuli, and Armenian stone.