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A fine grained lava of granite composition

A glassy lava of granite composition.

A course-grained rock of quartz, felspar and mica

A lava containing large and small crystals: Middle Devonain: Babbacomb cliff, Torquay.

Two meteorite fragments, part of a meteorite which fell in Harray, autumn 1889, weight 180pounds. Another piece fell at Bay of Skaill.

Haematite is a form of iron oxide and can be found on the island of Hoy, Orkney.

An ore of manganese.