Diabase
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Diabase, also called dolerite or microgabbro, is a mafic, holocrystalline, subvolcanic rock chemically equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow i
Diabase
Fair Head, Northern Ireland, a sill of dolerite
A diabase dike crosscutting horizontal limestone beds in Arizona
Diabase boulders at Devil's Den on the Gettysburg Battlefield, Pennsylvania, US
Bluestone
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Bluestone is a cultural or commercial name for a number of natural dimension or building stone varieties, including:
Diabase
…granite). Diabase can also be cut for use as ornamental stone for countertops, facing stone on buildings, and paving. A form of dolerite, known as bluestone, is one of the materials used in the construction of Stonehenge. Diabase also serves as local building stone. In Tasmania, where it is one of the most…
Carn Menyn bluestones. These dolerite slabs, split by frost action, seem to be stacked ready for the taking, and many have been removed over the centuries for local use. Research favours the theory that humans also transported stones from Carn Menyn to build Stonehenge, about 250 km away.
Bluestone monument and Carn Menyn, Preseli Hills
HM Prison Pentridge was one of the many buildings constructed of local bluestone in Melbourne in the 19th century
Typical colouring caused by mineralisation in Adelaide bluestone