Opaque Collection

Halite
Large cubes of halite (sodium chloride) which is a common resource of salt. This specimen is from Orenburg, Russia

Glazed octagonal tiles. 13th-14th centuries. Tiled Kiosk Museum. Archaeological Museum. Istanbul. Turkey

Phenakite is comprised of (beryllium silicate). Visually it closely resembles quartz, but chemically it is closer to gemstones such as topaz and beryl

Strontianite comprises of strontium carbonate with white spiky crystals and derives from the aragonite group. This specimen is from the collections held at the Natural History Museum, London

Beryl crystals
Beautifully formed beryly variety crystals of aquamarine, heliodor, morganite and emerald. Beryl comprises of (beryllium aluminum silicate)

Mimetite
A tall, orange prismatic crystal of mimetite. Mimetite comprises of (lead chloroarsenate)

Moodstone cut as cabochons. A cabachon is a highly polished convex-cut gem

Potentilla nivea L. snow cinquefoil
Sketch 2, Newfoundland Volumes. From a collection of original drawings and sketches by Georg Dionysius Ehret (1708-1770). Held in the Botany Library at the Natural History Museum, London

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