bluestone

Plural: bluestones

Noun

• bluish-grey sandstone used for paving and building
• Any of several bluish-grey varieties of stone used for construction:
• A form of dolerite which appears blue when wet or freshly broken.
• Any of several bluish-grey varieties of stone used for construction:
• Any of the several (massive) kinds of non-local stone (particularly dolerite) used to construct Stonehenge.
• Any of several bluish-grey varieties of stone used for construction:
• A feldspathic sandstone found in the US and Canada.
• Any of several bluish-grey varieties of stone used for construction:
• A form of limestone found in the Shenandoah Valley and some other places.
• Any of several bluish-grey varieties of stone used for construction:
• A bluish-grey basalt or olivine basalt.
• Any of several bluish-grey varieties of stone used for construction:
• Slate, such as comes from quarries in or near Adelaide.
• Any of several bluish-grey varieties of stone used for construction
• Either of two related copper- and sulfur-based bright blue stones:
• Copper(II) sulfate, CuSO₄(H₂O)ₓ where x is 0-5, used as a coloring agent in glass-making and pottery and for other purposes.
• Either of two related copper- and sulfur-based bright blue stones:
• Chalcanthite, a water-soluble sulfate mineral, CuSO₄·5H₂O.
• Lapis lazuli, or its core constituent, lazurite.

Verb

• To treat or dose with copper sulfate.

Related Words

sarsen, Stonehenge