Greenstone
Greenstone may refer to:
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Geology
    
- Greenstone (archaeology), various types of stone used by early cultures, covering jade and similar stones
 - Greenstone belt, Archean and Proterozoic volcanic–sedimentary rock sequences
 - Isle Royale greenstone Chlorastrolite, found in the Keweenaw Peninsula of Michigan and Isle Royale in the US
 - New Zealand Greenstone or Pounamu, several types of hard and durable stone found in southern New Zealand
 - Greensand (geology), glauconite bearing sandstone and a geologic formation in the UK
 - Greenschist, metamorphosed mafic volcanic rock and a metamorphic facies
 - Elvan, a quartz-porphyry found in Cornwall, UK
 
Places
    
- Greenstone, Ontario, a municipality in Canada
 - Greenstone Hill, a suburb of Johannesburg, South Africa
 - Greenstone Point, a high rock spur along the north front of Jones Mountains, Antarctica
 - Greenstone River, river in the Otago/Southland region, New Zealand
 
Other
    
- Greenstone (software), an open source digital library software package
 - Greenstone Building, a Canadian government building in Yellowknife
 - Greenstone TV, a television production company, New Zealand
 - Greenstone, the generics division of Pfizer
 
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