1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/1e8ac03c3e758db9adb14e72134069b9.jpg a210d39bdb7a265dd1995b5a84c81d32 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/fa85045449503b9b13debcb0ed647816.jpg bb56a913d756bc4f72dc1c31698975c6 Physical Object An inanimate, three-dimensional object or substance. Note that digital representations of, or surrogates for, these objects should use Moving Image, Still Image, Text or one of the other types. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource <h2>Dolomite</h2> Description An account of the resource <div class="element"> <h3>Formula</h3> <div class="element-text">CaMg(CO₃)₂</div> </div> <div class="element"> <h3>Structure</h3> <div class="element-text"> <p>Non-silicate</p> </div> </div> <div class="element"> <h3>Crystal System</h3> <div class="element-text"> <p><em>Crystal system:</em><span> </span>trigonal (-)</p> </div> </div> <div class="element"> <h3>Physical Properties</h3> <div class="element-text"> <p class="NoSpacing"><em><span>Colour in hand specimen:</span></em><span> white, often tinged with yellow or brown</span><span> </span><br class="NoSpacing" /><em><span>Cleavage:</span></em><span> rhombohedral</span><span> </span><br class="NoSpacing" /><em><span>Hardness:</span></em><span> 3.5-4 </span></p> </div> </div> <div class="element"> <h3>Optical Properties</h3> <div class="element-text"> <p class="NoSpacing"><em>Colour in plane polarised light:</em><span> </span>colourless<span> </span><br class="NoSpacing" /><em>Pleochroism:</em><span> </span>none<span> </span><br class="NoSpacing" /><em>Relief:</em><span> </span>low<span> </span><br class="NoSpacing" /><em>Birefringence:</em><span> </span>0.179-(0.185); &gt;4^{th<span> </span>}order<span> </span><br class="NoSpacing" /><em>Extinction:</em><span> </span>inclined<span> </span><br /><em>Twinning:</em><span> </span>lamellar, common</p> </div> </div> <div class="element"> <h3>Mineral Specimens</h3> <div class="element-text"> <p class="NoSpacing"><strong><span>M543 Dolomite, associated with siderite and copper pyrites</span></strong><span> </span><br class="NoSpacing" /><strong>Cerro Blanco</strong><strong>, Chile</strong><strong></strong><span> </span><br class="NoSpacing" />Rhombohedral crystals of dolomite with curved faces, associated with siderite (iron carbonate) and copper pyrite<span> </span><br class="NoSpacing" />White, slightly grey<span> </span><br />Hardness 3.5 – 4</p> </div> </div> <div class="element"> <h3>Rock Specimens</h3> <div class="element-text"> <p><a href="/p1acollections/exhibits/show/sedimentary-rocks/l352">L352 Limestone, dolomitic</a></p> </div> </div> <div class="element"> <h3>Mineral Name</h3> <div class="element-text">dolomite</div> </div> magnesium rhomb