Malachite is naturally-occurring copper carbonate, with a characteristic bright green colour. This polished slice, cut through a botryoidal mass (shaped like a bunch of grapes), shows that the mineral was deposited in layers. The specimen is from Arizona, USA, and was acquired as part of the John Taylor collection.
- Item reference: BRSUG 2559
- Photographer: Simon Powell
- Copyright: Department of Earth Sciences, University of Bristol
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