<![CDATA[1A Collections]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/browse?tags=magnesium&output=rss2 Tue, 09 Apr 2024 21:16:19 +0100 p1acollections@esc.cam.ac.uk (1A Collections) Zend_Feed http://blogs.law.harvard.edu/tech/rss <![CDATA[Dolomite]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/65

Title

Dolomite

Description

Formula

CaMg(CO3)2

Structure

Non-silicate

Crystal System

Crystal system: trigonal (-)

Physical Properties

Colour in hand specimen: white, often tinged with yellow or brown 
Cleavage: rhombohedral 
Hardness: 3.5-4 

Optical Properties

Colour in plane polarised light: colourless 
Pleochroism: none 
Relief: low 
Birefringence: 0.179-(0.185); >4th order 
Extinction: inclined 
Twinning: lamellar, common

Mineral Specimens

M543 Dolomite, associated with siderite and copper pyrites 
Cerro Blanco, Chile 
Rhombohedral crystals of dolomite with curved faces, associated with siderite (iron carbonate) and copper pyrite 
White, slightly grey 
Hardness 3.5 – 4

Rock Specimens

L352 Limestone, dolomitic

Mineral Name

dolomite
dolomite_1.jpg
dolomite_CS.jpg
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