<![CDATA[1A Collections]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/browse?tags=grey&output=rss2 Tue, 09 Apr 2024 21:16:15 +0100 p1acollections@esc.cam.ac.uk (1A Collections) Zend_Feed http://blogs.law.harvard.edu/tech/rss <![CDATA[Galena]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/61

Title

Galena

Description

Formula

PbS

Structure

Non-silicate

Crystal System

Crystal system: cubic

Physical Properties

Colour in hand specimen: lead grey
Streak: lead grey
Lustre: metallic
Cleavage: one, perfect
Hardness: 2.5

Optical Properties

Colour in plane polarised light: opaque
Relief: high

Mineral Specimens

M412 Quartz (with galena and pyrite) 
North Wales 
A mass of small hexagonal quartz prisms, with galena, pyrite and zinc blende. 
Transparent, white to light grey 
Galena: purple-black, shiny, platy habit, metallic 
Pyrite: metallic lustre, gold colour, cubic habit, “Fools’ gold”

Mineral Name

galena
galena_CS.jpg
galena_1.jpg
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