Geology Superstore
Geology Superstore

Glaucophane Schist

£3.45£6.90 ex VAT

Glaucophane Schist is also known as Blueschist. The blue-green colour comes from the dominant presence of the minerals Glaucophane (amphibole) & Lawsonite (related to epidote). These specimens were collected from the Isle of Anglesey, North Wales.

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Glaucophane schist also known as Blueschist is a metavolcanic rock that forms by the metamorphism of basalt and rocks with similar composition at high pressures and low temperatures, approximately corresponding to a depth of 15 to 30 kilometers and 200 to ~500 degrees Celsius. The blue color of the rock comes from the presence of the predominant minerals glaucophane and lawsonite. Usually fine grained due to the rapidity & low temperatures of the mechanism involved. However, porphyritic varieties can be found. This example is from the Isle of Anglesey, N. Wales. Specimens are supplied in labelled card trays.

Weight 130 g
Specimen Size

2" x 2", 3" x 2", 4" x 3"

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