Bluestone or blue stone may refer to:

Minerals and stones

• Bluestone, a building stone of various lithologies
• Pennsylvania Bluestone, a bluestone from a specific region in the United States
• Copper(II) sulfate, hydrated form of the chemical compound
• Chalcanthite, hydrated copper(II) sulfate mineral
• Lazurite, a sulfide of sodium aluminium silicate and the core constituent of lapis lazuli
• Sin-Kamen (in Russian literally: Blue Stone), a type of pagan sacred stones, widespread in Russia

Places

• Preseli Hills, known as the bluestone area of Pembrokeshire
• Bluestone, Pembrokeshire, a luxury holiday resort in the Pembrokeshire National Park

Fiction

• Matt Bluestone, a character from the Gargoyles
• Bluestone 42, a British comedy drama TV series

Other

• Blue Stone (neutron initiator), a British nuclear weapon component
• Bluestone Television
• Blue Stone (music group), an American electronic-pop musical project
• Bluestone Group, a portfolio and asset management business
• Irving Bluestone (1917 – 2007), negotiator for workers at General Motors in the 1970s
• Bluestone family murders, 2001 crime in England