1 10 2 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/843d5e0446ec9d2c4295db1f6c0a4ee8.jpg 81b2ce4c0a05b83ee042387c2c152222 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/86cff81081acbf0eac740be4157e010f.jpg 74ab1618aaec0ee5b25910722f62cc76 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>Fluorite</h2> Description An account of the resource <div class="element"> <h3>Formula</h3> <div class="element-text">CaF₂</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>cubic</p> </div> </div> <div class="element"> <h3>Physical Properties</h3> <div class="element-text"> <p><em>Colour in hand specimen:</em><span> </span>extremely variable: colourless, white, yellow, green, blue and purple most common<br /><em>Cleavage:</em><span> </span>perfect octahedral, up to four visible at one time, breaks into dipyramids<br /><em>Hardness:</em><span> </span>4</p> </div> </div> <div class="element"> <h3>Optical Properties</h3> <div class="element-text"> <p><em>Colour in plane polarised light:</em><span> </span>colourless, pale green or pale violet<br /><em>Pleochroism:</em><span> </span>none<br /><em>Relief:</em><span> </span>low</p> </div> </div> <div class="element"> <h3>Mineral Specimens</h3> <div class="element-text"> <p class="NoSpacing"><strong><span>M560 Fluorite</span></strong><span> </span><br class="NoSpacing" /><strong>Derbyshire</strong><strong><span> </span></strong><br class="NoSpacing" />Cubic fluorite crystals<span> </span><br class="NoSpacing" />Generally very variable; in this case white to purple<span> </span><br class="NoSpacing" />Glassy lustre<span> </span><br class="NoSpacing" />Hardness 4<span> </span><br class="NoSpacing" />Octahedral cleavage</p> </div> </div> <div class="element"> <h3>Mineral Name</h3> <div class="element-text">fluorite</div> </div> volatile https://wserv3.esc.cam.ac.uk/p1acollections/files/original/2b220318e8337f2ccddde4e3a52736b2.jpg c9f964a85e0bce7a4ae84d76bd8885d9 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>Apatite</h2> Description An account of the resource <div class="element"> <div class="element"> <h3>Formula</h3> <div class="element-text">Ca₅(PO₄)₃(OH,F,Cl)</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>hexagonal (-)</p> </div> </div> <div class="element"> <h3>Physical Properties</h3> <div class="element-text"> <p><em>Colour in hand specimen:</em><span> </span>green, white, yellow, blue brown etc.<br /><em>Hardness:</em><span> </span>5</p> </div> </div> <div class="element"> <h3>Optical Properties</h3> <div class="element-text"> <p><em>Colour in plane polarised light:</em><span> </span>generally colourless<br /><em>Pleochroism:</em><span> </span>weak to moderate in coloured varieties<br /><em>Relief:</em><span> </span>moderate<br /><em>Birefrinence:</em><span> </span>0.001-0.007; first order greys<br /><em>Extinction:</em><span> </span>straight<br /><em>Form:</em><span> </span>commonly hexagonal in cross-section</p> </div> </div> <div class="element"> <h3>Rock Specimens</h3> <div class="element-text"> <p><a href="/p1acollections/exhibits/show/igneous-rocks/l100">L100 Alkali granite</a><span> </span><br /><a href="/p1acollections/exhibits/show/igneous-rocks/l101">L101 Granite</a><span> </span><br /><a href="/p1acollections/exhibits/show/igneous-rocks/l120">L120 Granodiorite</a><span> </span><br /><a href="/p1acollections/exhibits/show/igneous-rocks/l130">L130 Andesite, porphyritic (porphyrite)</a></p> </div> </div> <div class="element"> <h3>Mineral Name</h3> <div class="element-text">apatite</div> </div> </div> igneous volatile