Anglesite and Galena

ID	578
Mineral	Anglesite Galena
Location	Touissit - Jerada - Morocco
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Anglesite information at mindat.org View Galena information at mindat.org

ID	233
Long ID	1:1:233:2
Formula	`Pb(SO₄)`
IMA Status	0 1
Industrial	Ore of lead.
Discovery Year	1832
Diapheny	Transparent,Translucent,Opaque
Cleavage	Good on {001}, distinct on {201}; on {010} in traces.
Tenacity	brittle
Colour	Colorless to white, often tinted grey, yellow, green or blue; colourless in transmitted light.
Hardness (min)	2.5
Hardness (max)	3.0
Luminescence	Often flouresces yellow under LW UV.
Lustre	Adamantine to resinous, or vitreous.
About the name	Named in 1832 by Francois Sulpice Beudant for the type locality, the Parys Mine on the Island of Anglesey (Ynys Môn) in Wales, U.K.
Streak	Colorless
Crystal System	Orthorhombic
Cleavage Type	Distinct/Good
Fracture type	Conchoidal
Morphology	Crystals frequently thin to thick tabular {001}, commonly with {210}, {101} and rhomboidal in outline. Also extended [100] or [010] at times. Prismatic [001] with large {210} and vertically striated; prismatic [100], with large {011}; stout prismatic [010], with {101}, {102}; tabular {100}; equant or pyramidal with {111}, {211} or otherwise. {100} and {210} commonly striated [001]. Massive; granular to compact; nodular; stalactitic.
Twinning	None observed.
UV	Shades of yellow and golden-yellow (UV).
Thermal Behaviour	Inverts to a monoclinic polymorph at about 864°C. Decomposes between 900°C and 1000°C.
key_elements	0
shortcode_ima	Ang
Group	Baryte Group

ID	1641
Long ID	1:1:1641:0
Formula	`PbS`
IMA Status	0 1
Industrial	Principal ore of lead. Often contains silver and is a frequent ore of that metal as well.
Diapheny	Opaque
Cleavage	{001}
Tenacity	brittle
Colour	Lead-grey
Hardness (min)	2.5
Hardness (max)	2.5
Luminescence	None
Lustre	Metallic
About the name	Named by Pliny the Elder in 77-79 from the Greek "galene" meaning "lead ore".
Streak	Lead-grey
Crystal System	Isometric
Cleavage Type	Perfect
Fracture type	Sub-Conchoidal
Morphology	Cubes, octahedrons, cube-octahedron combinations and rarely dodecahedrons. Rarely, platy twins.
Twinning	Spinel-type {111}, lamellar {114}
UV	Not fluorescent in UV.
Thermal Behaviour	In an open tube, gives sulfurous fumes.
key_elements	0
shortcode_ima	Gn
Group	Galena Group

MinID: GVU-LJ7

Price: € 125

Dimensions: Not registered

Weight: Not registered

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