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You can search for an entry using this form:</p><div id="glossarysearch"> <script> gTabPos["glos"]=0; </script><script> function cfvalidate_glos() { var isval = 1; cfrichtextupdate_glos(); return true;} </script><form method="get" name="glos" action="/web/20160416235904/http://www.mindat.org/glossary.php" enctype="multipart/form-data" onsubmit="return(cfvalidate_glos());"><input type="hidden" name="frm_id" value="glos"><input type="hidden" name="cform_is_valid" value="1"><span>Search glossary for: </span><input type="text" id="s" name="s" value=""><input type="submit" value="Search Glossary" name="submit_glos"></form><script> function cfrichtextupdate_glos() { }</script></div><h2>Results</h2><ul id="glossary"><li><a href="/web/20160416235904/http://www.mindat.org/glossary/graphic">graphic<div>i. Said of the texture of an igneous rock that results from the regular intergrowth of quartz and feldspar crystals. The quartz ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/rain_fall_agate">rain fall agate<div>See Yuhua Stone</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/yuhua_stone">yuhua stone<div>Any pretty pebble from http://www.mindat.org/loc-270534.html is a Yuhua Stone. For 1500 hundred years these have been treasured ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/anthodites">anthodites<div>(Greek ἄνθος ánthos, “flower”, -ode, adjectival combining form, -ite adjectival suffix) are speleothems (cave ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/ptygmatic_folding">ptygmatic folding<div>Primary folding in migmatites (injection gneisses, etc.), caused by the high-temperature and high-pressure processes to which the ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/orbicular_structure">orbicular structure<div>A structure developed in certain phanerocrystalline rocks (e.g., granite and diorite) due to the occurrence of numerous ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/tufa">tufa<div>A chemical sedimentary rock composed of calcium carbonate, formed by evaporation as a surficial, spongy, porous, semifriable ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/hoist">hoist<div>i. The windlass mechanism incorporated as an integral part of a power-driven drilling machine used to handle, hoist, and lower ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/mineral_parting">mineral parting<div>Mineral breakage along specific crystallographic planes in some specimens due to twinning, exsolution lamellae, or chemical ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/exsolution_texture">exsolution texture<div>A general term for the texture of any mineral aggregate or intergrowth formed by exsolution. It is generally fairly homogeneous, ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/wehrlite_(rock)">wehrlite (rock)<div>A peridotite composed chiefly of olivine and clinopyroxene with accessory opaque oxides common.</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/liparite">liparite<div>A syn. of rhyolite used by German and Soviet authors. Its name, given by Roth in 1861, is derived from the Lipari Islands, in the ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/columnar_jointing">columnar jointing<div>Parallel, prismatic columns, polygonal in cross section, in basaltic flows and sometimes in other extrusive and intrusive rocks. ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/warrenite">warrenite<div>i. A general term for gaseous and liquid bitumens consisting mainly of a mixture of paraffins and isoparaffins: a variety of ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/breccia">breccia<div>A coarse-grained clastic rock, composed of angular broken rock fragments held together by a mineral cement or in a fine-grained ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/framboidal_texture">framboidal texture<div>A texture in which pellets form spheroidal aggregates resembling a raspberry. PyritePyrite</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/skarn">skarn<div>An old Swedish mining term for silicate gangue (amphibole, pyroxene, garnet, etc.) of certain iron ore and sulfide deposits of ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/granite">granite<div>i. A plutonic rock in which quartz constitutes 10% to 50% of the felsic components and in which the alkali feldspar/total ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/triboluminescence">triboluminescence<div>i. The property of some specimens of zinc sulfide of emitting sparks when scratched. Ref: Fay ii. Luminescence in which ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/indicator_mineral">indicator mineral<div>An indicator mineral occurs with an ore mineral and indicates it presence. A hand sample of the ore mineral may be devoid of the ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/pop_rock">pop rock<div>Pop rocks are mineral or rock formations which generally occur loose in soil or sand. Many pop rocks are concretions formed by a ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/frl">frl<div>FRL = First Reported Locality</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/hardness_scale">hardness scale<div>i. The scale by which the hardness of a mineral is determined as compared with a standard. The most frequently used and quoted ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/leaverite">leaverite<div>A slang term for a rock found in the field and of such low quality as a specimen, it should be left in the field. Leaverite is ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/buchite">buchite<div>An uncommon metamorphic rock type composed mostly of glass, formed by the melting of a sedimentary rock or soil by heat from an ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/picking_table">picking table<div>l. A flat, or slightly inclined, platform on which the coal or ore is run to be picked free from slate or ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/hardness">hardness<div>In mineralogy, hardness is the resistance to scratching or abrasion of one mineral by another. The Mohs hardness scale is a ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/abbreviations">abbreviations<div>AAS (atomic absorption spectroscopy) AES (atomic emission spectroscopy) AFM (atomic force microscopy) apfu (atoms per formula ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/moki_marbles">moki marbles<div>See Moqui Marbles</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/felsic">felsic<div>A mnemonic adj. derived from (fe) for feldspar, (l) for lenad or feldspathoid, and (s) for silica, and applied to light-colored ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/printstone">printstone<div>A local marketing name for a siliceous siltstone with a distinctive Graphic pattern found near Tom Price, Pilbara Region, Western ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/basanite.">basanite.<div>A fine grained, near-black feldspathoid-bearing basaltic rock. It can also be used for a black chert: see basanite</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/moqui_marbles">moqui marbles<div>Moqui Marbles, also called Moqui balls, and "Moki marbles", are iron oxide concretions which can be found eroding in great ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/scalenohedron">scalenohedron<div>An important form in the rhombohedral system: a solid bounded by twelve scalene triangles and still showing a threefold ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/scalenohedral">scalenohedral<div>A hemihedral crystal form of 8 or 12 faces, each face being a scalene ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/dolerite">dolerite<div>i. In the United States, a syn. of diabase Ref: AGI ii. In British and Australian usage: A medium grained mafic intrusive ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/subophitic">subophitic<div>Said of the texture of an igneous rock in which the feldspar crystals are approx. the same size as the pyroxene and are only ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/basalt">basalt<div>A general term for fine grained, mafic (dark-colored) igneous rocks, commonly extrusive (volcanic) but locally intrusive (e.g., ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/trace_fossil">trace fossil<div>A fossilized track, trail, burrow, boring, or other structure in sedimentary rock that records the presence or behavior of the ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/indurated">indurated<div>(a.) Hardened; applied to rocks hardened by heat, pressure or by the addition of a cementing ingredient, for example, a marl ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/streak_plate">streak plate<div>In mineral identification, a piece of unglazed porcelain, hardness about 7 on the Mohs scale, used for rubbing a sample to obtain ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/pig">pig<div>i. A crude casting of metal convenient for storage, transportation, or melting; esp. one of standard size and shape for marketing ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/pillar">pillar<div>i. A column of coal or ore left to support the overlying strata or hanging wall in a mine, generally resulting in a 'room and ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/monitor">monitor<div>i. A high-pressure nozzle, mounted in a swivel on a skid frame, used to direct high-pressure water (hydraulic water) on ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/flabellate">flabellate<div>Fan shaped.</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/flabelliform">flabelliform<div>A term used to describe minerals with a fan-shaped structure or habit (e.g., prehnite).</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/columnar_disjunction">columnar disjunction<div>When lavas experience a slow cool-down, they retract in all directions, resulting in a geometrical pattern of thin fractures. ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/blue_cap">blue cap<div>The characteristic blue halo, or tip, of the flame of a safety lamp when combustible gases are present in the air. See Also: ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/faden_quartz">faden quartz<div>Faden quartz is a descriptive term for a usually tabular group of quartz crystals with a white thread-like or string-like zone ...</div></a></li><li><a href="/web/20160416235904/http://www.mindat.org/glossary/bipyramid">bipyramid<div>bipyramid In crystallography, a double-ended pyramid. Ref: Fay A closed crystal form consisting of a positive and negative ...</div></a></li></ul></div><div id="backdropad" class="hidetablet hidephone"></div> <div id="backdroptext" class="hidetablet hidephone"></div> <div id="backdropadt" class="hidephone hidepc"></div> <div id="backdroptextt" class="hidephone hidepc"></div> <div id="backdropadm" class="hidetablet hidepc"></div> <div id="backdroptextm" class="hidetablet hidepc"></div> <video id="backdropvid"></video> <div id="backdropfade"></div> </div><div id="bformblock"> <form class="flatform" method="get" action="/web/20160416235904/http://www.mindat.org/nsearch.php"> Mineral <input name="name" style="width: 137px;"/> and/or Locality <input name="loc" style="width: 137px;"> <input type="submit" value="Search"/> </form> </div> <div id="footertext"> Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.<br>Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2016, except where stated. 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