1. Bluish-grey sandstone used for paving and building

1. Hydrated blue crystalline form of copper sulphate
   - blue vitriol, blue copperas, chalcanthite

Derived forms: bluestones, blue stones

Type of: copper sulfate, copper sulphate [Brit, Cdn], cupric sulfate, cupric sulphate [Brit, Cdn], sandstone

Encyclopedia: Blue stone

• Hyperstat
• hypersthene
• hypersurface
• Hypertensin
• hypertension
• hypertensive
• hypertext
• hypertext mark-up language
• hypertext system
• hypertext transfer protocol
• hyperthermal
• hyperthermia
• hyperthermy
• hyperthyroidism
• hypertonia
• hypertonic
• hypertonicity
• hypertonus
• hypertrophic cardiomyopathy
• hypertrophic rosacea
• hypertrophied
• hypertrophy
• hypervelocity
• hyperventilate
• hyperventilation