Muséum national d'histoire naturelle _ The species

FROM : Shaft n°9, Touissit, Morocco
SIZE : 8 x 6 x 2 cm

The sample showed here is a 8 X 6 X 2 cm transparent monocrystal, with a slightly amber color. It is laid out perpendicularly to a small aggregate of centimetric crystals of anglesite forming its basis.

This sample arises from the shaft N°9 of the Touissit mine (Morocco). It is the fruit of an extensive selection of samples, operated for 20 years by a collector having lived in Morocco and who collected only minerals from Morocco.

This mineral, obtained thanks to support from Total, is by its quality of crystallization – which includes a perfect form, transparency and crystallization - one of the most beautiful collected in this outcrop.

This sample is currently exposed in the Treasure Room, within the Gallery of Mineralogy of the Muséum national d’Histoire naturelle.

Photography: Louis-Dominique Bayle, © MNHN.

SPECIE : Anglesite

HISTORY : Named after its type-locality: Anglesey Island, UK

Species named in 1832 by François-Sulpice Beudant (1787-1850), French mineralogist and geologist, by redescribing the species from samples of the Jacques-Louis de Bournon private collection (1751-1825)

Type-locality: Mine Parys, Anglesey island, Wales
ANCIENT NAME : Plomb vitriol, plomb sulfaté

CHEMICAL FORMULA : Pb SO4
CRYSTAL SYSTEM : Orthorhombic
COLOR : Colorless, white, yellowish, gray
DIAPHANIETY : Transparent to translucent
LUSTER : Adamantine, resineous, vitreous
STREAK : White
MORPHOLOGY : Tabular crystals, isometric prismatic, forming aggregates
HARDNESS : 2,5-3,0
DENSITY : 6,36

CHEMICAL CLASS : VI - Sulfates, chromates,
GROUP : Barytine
STRUNZ CLASS BEFORE 2001 : 6/A.09-50
STRUNZ CLASS AFTER 2001 : 7.AD.35

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Anglesite

Anglésite

MNHN N°196.195

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