1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/b8b233edb6e035dc684e24f4623b773c.jpg eccd6795baa14b8a4a88173b5a20e307 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>Epidote</h2> Description An account of the resource <div class="element"> <h3>Formula</h3> <div class="element-text">Ca₂Al₂O∙(Al,Fe³⁺)OH[Si₂O₇][SiO₄]</div> </div> <div class="element"> <h3>Structure</h3> <div class="element-text"> <p>Orthosilicate</p> </div> </div> <div class="element"> <h3>Crystal System</h3> <div class="element-text"> <p><em>Crystal system:</em><span> </span>monoclinic (-)</p> </div> </div> <div class="element"> <h3>Physical Properties</h3> <div class="element-text"> <p><em>Colour in hand specimen:</em><span> </span>green<br /><em>Cleavage:</em><span> </span>one, perfect<br /><em>Hardness:</em><span> </span>6</p> </div> </div> <div class="element"> <h3>Optical Properties</h3> <div class="element-text"> <p><em>Colour in plane polarised light:</em><span> </span>yellow-green<br /><em>Pleochroism:</em><span> </span>yes<br /><em>Relief:</em><span> </span>high<br /><em>Birefringence:</em><span> </span>0.015-0.051; 1st order orange to 3rd order pink<br /><em>Extinction:</em><span> </span>inclined<br /><em>Twinning:</em><span> </span>lamellar, not common</p> </div> </div> <div class="element"> <h3>Rock Specimens</h3> <div class="element-text"> <p><a href="/p1acollections/exhibits/show/sedimentary-rocks/l354">L354 Limestone, shelly</a></p> </div> </div> <div class="element"> <h3>Mineral Name</h3> <div class="element-text">epidote</div> </div> low grade medium grade secondary