Feldspar - Law Dictionary Search Results
Norite
A granular crystalline rock consisting essentially of a triclinic feldspar as labradorite and hypersthene
Miascite
A granitoid rock containing feldspar biotite elaeligolite and sodalite
Moonstone
A nearly pellucid variety of feldspar showing pearly or opaline reflections from within It is used as a gem The best specimens come from
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Schist
common kinds are mica schist and hornblendic schist consisting chiefly of quartz with mica or hornblende and often feldspar
Perthite
A kind of feldspar consisting of a laminated intertexture of albite and orthoclase usually of different colors
Porphyritic
Relating to or resembling porphyry that is characterized by the presence of distinct crystals as of feldspar quartz or augite in a relatively fine grained base often aphanitic or cryptocrystalline
Porphyry
loosely to designate a rock consisting of a fine grained base usually feldspathic through which crystals as of feldspar or quartz are disseminated There are red purple and green varieties which are highly esteemed as marbles
Saussurite
It is near zoisite in composition and in part at least has been produced by the alteration of feldspar
Kaolinization
The process by which feldspar is changed into kaolin
Lath shaped
Having a slender elongated form like a lath said of the feldspar of certain igneous rocks as diabase as seen in microscopic sections
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