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Glossary of Terms

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ALL

All Abrasive Earthy luster Mafic Refract Absolute hardness Eclogite Magma Refraction Absorption spectra Effervesce Magmatic Refractive index Absorption spectrum Effervescence Magmatite Refractive indices Accessory mineral Effervescent Magmatite rock Refractometer Acicular Effloresce Magnesia Relative density Acid Efflorescence Magnet Reniform Acid test Efflorescent Magnetic Repeated twinning Activator Eightling Magnetic field Repeated twins Adamantine Elastic Magnetism Replace Adularescence Electric Malleability Replaced Adularescent Electrical Malleable Replacement Aggregate Electricity Mammilary Replacing Alkali Electromagnetic radiation Mantle Resinlike luster Alkali Feldspar Electrometallurgy Marble Resinous Alkaline Electron Marquise Resinous luster Alloy Element Massive Resistance Alloyed Elements Matrix Resistant Alloying Elongated Melting point Reticulated Alluvial Embedded crystal Mesothermal vein Rhomb Alluvial deposit Emerald Metal Rhomb-scalenohedron Alluvion Emerald cut Metallic Rhombic Alluvium Empirical formula Metallic elements Rhombic dodecahedron Alpha rays Enaniotropic Metallic luster Rhombohedral Alpine Encrust Metallurgy Rhombohedral cleavage Alpine cavity Encrustation Metamict Rhombohedron Alter Encrusting Metamiction Rhyolite Alteration End member Metamorphasized Rift Altered Engrave Metamorphic Ring silicates Amalgam Engraving Metamorphic rock Rock Amber Environment Metamorphism Rock crystal Ammonia Epimorph Metamorphosed Rock shop Ammonium hydroxide Epitaxy Metasilicate chains Rock show Amorphous Epithermal vein Metasilicate rings Rock-forming mineral Amphibole Epsom salts Metasilicates Rosette Amphibole group Equant Metasomatically Rough Amygdule Equidimensional Metasomatism Round Anhydrous Eroded Metastability Rust Anhydrous borates Erosion Metastable Rusting Anhydrous sulfates Euhedral Meteor Rutilated Anion Evaporate Meteoric Rutile twin Anisotropic Evaporation Meteorite Saccharoidal Anisotropism Evaporite Meteoroid Saline Anticline Evaporite deposit Mica Saline deposit Antimonides Even Mica group Saline lake Apatite group Even fracture Micaceous Salinity Aqua fortis Extract Microcrystal Salt Aqua regia Extraction Microcrystalline Salt dome Aqueous Extraterrestrial Micromount Salt Lake Aragonite group Extrusive Mine Sand Arborescent Face Miner Sandstone Argentiferous Facet Mineral Sassuritization Argillacious Faceted Mineral group Scalenohedral Arid Faceting Mineral series Scalenohedron Arsenates Fault Mineral show Scales Arsenide Feldspar Mineralogical Scaly Arsenides Feldspar group Mineralogist Scepter Asbestos Feldspathoid Mineralogy Schiller Asbestos amphibole Feldspathoid group Mineraloid Schist Asterism Felsic Mining Sclerometer Asteroid Ferrian Mixed crystal Secondary Asymmetrical Ferroginous Mohs Hardness scale Secondary mineral Atom Ferromagnetic Mohs Scale Sectile Atomic Ferromagnetism Molecular Sectility Atomic structure Ferrous Molecular arrangement Sediment Atomical Fiber Molecular structure Sedimentary Atomical arrangement Fibrous Molecule Sedimentary rock Atomically Filiform Mollusk Sedimentation process Auriferous Fire Molten Selenides Autochthonous Fishtail twin Molten rock Selvage Aventurescence Fissile Molybdates Semi-metal Aventurization Fissility Monochromatic Semi-metallic Axes Flaky Monoclinic Semi-metallic elements Axis Flame test Monotropic Semi-precious Axis of symmetry Flat Mother of pearl luster Semi-precious gemstone Band Flaw Mother rock Series Banded Flawless Mother-of-pearl Setting Banding Flexibility Mottled Shaft Basal Flexible Multicolored Shale Basal cleavage Flexible and elastic Multiple oxides Sheaflike Basal pinacoid Flexible but inelastic Mylonite Sheet silicates Basalt Floater Nacre Shelly fracture Base Floater crystal Native Shortwave Basic Flow banding Native elements Silica Batholith Flowstone Natural glass Silica gel Bead test Fluoresce Nepheline syenite Silica group Bed Fluorescence Nesosilicates Silicafied Bedding Fluorescent Neutron Silicate Bedrock Fluorescent lamp Nitrates Silicates Belemnite Fluorite twin Nitric acid Siliceous Beta rays Fluvial Nodular Silky Bipyramid Fluvial deposit Nodule Silky luster Bipyramidal Flux Non-crystalline Sill Bipyramidal hexagon Fold Non-metallic Silt Bipyramidal hexagonal Foliated Non-metallic elements Simple oxides Bipyramidal hexagonal prism Form Nonbrittle Simple sulfides Birefringence Formula Nonmetal Sinter Birthstone Fossil Nuclei Sixling Bitumen Fossiliferous Nucleus Skarn Bituminous Fossilization Nugget Skeletal Bladed Fossilize Obsidian Slab Blowpipe test Fossilized Occurrence Slag Boiling point Fourling Ochre Slate Bond Fracture Octacube Smelt Borate Framework silicates Octagon Smooth fracture Borates Freezing point Octahedra Snakehead Borax Friable Octahedral Soil Botryoid Fulgurite Octahedral cleavage Solid solution Botryoidal Fumarole Octahedral cube Solidify Boule Fusion Octahedron Solubility Brass Gabbro Oil of vitriol Soluble Breccia Gamma rays Oiling Solution Brecciated Gangue Oily luster Solvent Brilliant cut Gangue material Oolite Sorosilicates Brilliant luster Garnet Group Oolitic Spar Brine Garnet paper Opalesce Specific gravity Brittle Geiger counter Opalescence Specimen Bronze Gem Opalescent Spectra Brownspar Gemminess Opalization Spectral Bullion Gemmy Opalize Spectrograph Cabochon Gemological Opaque Spectrometer Calcareous Gemologist Open Pit Spectrophotometer Calcic Gemology Optical Spectroscope Calcite group Gemstone Optical properties Spectroscopy Cameo Geode Optics Spectrum Capillary Geologic Ore Sphenoidal Carat Geological Organic Spherical Carbonate Geologist Orthorhombic Spherulite Carbonates Geology Orthosilicates Spherulitic Carlsbad twin GIA Outcrop Spinel twin Carved Gilson Process Oval Spinel-law twin Carving Glass Overtone Splendent luster Cassiterite twin Glassy luster Oxidation Splinter Cast Glauber's salt Oxidation minerals Splintery Casting Globular Oxidation zone Splintery fracture Cat's eye Gneiss Oxide Square Cat's eye effect Goniometer Oxides Stable Cation Gossan Oxidize Stalactite Catseye Grain Oxidized Stalactitic Cave Grainy Oxidized zone Stalactitically Cavern Gram Paleontologist Stalagmite Cavities Granite Paleontology Stalagmitic Cavity Granitic Pallasite Staurolite twin Cementation zone Granular Panning Stellate Center of symmetry Gravel Paragenesis Stock Chain silicates Gravity Paramagnetic Stone Chalk Greasy Paramagnetism Strahler Chatoyancy Greasy luster Paramorph Strata Chatoyant Group Parting Stratification Chemical Grouping Patina Stratum Chemical bond Habit Pear Streak Chemical composition Hackly Pearl Streak plate Chemical formula Halides Pearly Striated Chemical structure Halogen Pearly luster Striations Chemist Hard water Pegmatite Structural Chemistry Hardness Pendant Structure Chondrite Hardness testing kit Penetration Stubby Chondrules HCl Penetration twin Stud Chromates Heart Penetration twinning Sub-metallic Chrysoberyl twin Heat treated Pentagonal dodecahedron Subconchoidal Clast Heat treating Percussion figure Subconchoidal fracture Clay Heat treatment Peridotite Subgroup Cleavable Hemimorphic Periodic table Sublimate Cleavage Hemispherical Perky box Sublimation Cleavage angle Hexagon Petrifaction Submetallic Cleavage face Hexagonal Petrification Sulfate Cleavage fragment Hexagonal bipyramid Petrified Sulfates Cleavage surface Hexagonal bipyramidal Petrified wood Sulfide Cleave Hexagonal shape Petrographer Sulfides Cleaved Hexoctahedral Petrographic microscope Sulfosalts Cleaved surface Hexoctahedron Petrography Sulfuric acid Cleaving Hopper Petroleum Surrounding rock Clinopinacoid Hornfels Petrologist SW Clinopinacoidal Host mineral Petrology Swallowtail twin Cluster Hot spring pH Syenite Coal Hydrate Phantom Symmetrical Coating Hydrated Phantom growth Symmetry Cockscomb Hydration Phenocryst Synthesized Color Hydrocarbons Phosphate Synthetic Columnar Hydrochloric acid Phosphates Synthetic gem Composition Hydrofluoric acid Phosphoresce Tabular Compound Hydrometallurgy Phosphorescence Tarnish Concentric Hydrothermal Phosphorescent Tectosilicates Conchoidal Hydrothermal Method Phyllosilicates Tellurides Concretion Hydrothermal Vein Physicist Tenacity Concretionary Hydrous Physics Tenebrescence Conductivity Hydrous borates Piezoelectric Tenebrescent Conductor Hydrous sulfates Piezoelectricity Terminated Conglomerate Hydroxides Pinacoid Termination Contact metamorphism Hydroxyl Pinacoidal Tetragonal Contact twinning Hygroscopic Pinacoidal cleavage Tetragonal trisoctahedron Coprolite Hygroscopy Pipe Tetrahedral Coral Hypothermal vein Pisolite Tetrahedron Core Icosahedra Pisolitic Texture Coxcomb Icosahedral Pit Thermal Crater Icosahedron Pitchlike luster Thermoluminescence Crazing Icosi-tetrahedron Pitchy Thermoluminescent Crumbly Idiochromatic Placer Thumbnail Crust Igneous Placer deposit Tourmaline group Crusty Igneous rock Plagioclase twin Transformation Cryptocrystalline IMA Plane Translucency Crystal Impure Plane of symmetry Translucent Crystal aggregate Impurities Planetoid Transparency Crystal angle Impurity Plate Transparent Crystal class In Situ Plate-like Trap rock Crystal face Included Plated Trapezohedra Crystal group Inclusion Platy Trapezohedral Crystal habit Incrust Playa Trapezohedron Crystal lattice Incrustation Pleochroic Traprock Crystal structure Incrusting Pleochroism Triboluminescence Crystal symmetry Index of refraction Plug Triboluminescent Crystal system Indiscernible Plumose Trichroic Crystalline Infiltration Plutonic Trichroism Crystallization Ingot Plutonic rock Triclinic Crystallize Inorganic Pocket Trigonal Crystallized Inosilicates Point Trilling Crystallographer Insoluble Polished Trillion Crystallographically Intaglio Polychromatic Triplet Crystallography Intermediary Polyhedron Trisoctahedral ct Intermediary Member Polymorph Trisoctahedron Cube Intrusion Polymorphism True phosphates Cubic Intrusive Polymorphous Trunk Cubic cleavage Intrusive rock Polysynthetic twinning Tube test Cubic octahedron Ion Polysynthetic twins Tuberose Cubic system Iridesce Polytype Tufa Cuboctahedral Iridescence Porcelaneous Tufacious spring Culet Iridescent Porous Tuff Cut Irradiate Porphry Tumbled Cyclosilicates Irradiated Porphyritic Tumbler Cymophane effect Irradiation Potash feldspar Tungstates Decomposition Isometric Potassium feldspar group Tungstates and Molybdates Decrepitation Isomorph Potspar Tungstens Dehydration Isomorphism Precious gemstone Twin Dendrite Isomorphous Precious metal Twinned Dendritic Isotropic Precious stone Twinned crystal Density Isotropization Precipitating Twinning Deposit Isotype Precipitation Type locality Detrital Isotypism Primary Ultrabasic Detritus Isotypous Primary mineral Ultramafic Devitrification Ivory Princess Ultraviolet Devitrify Jagged Prism Ultraviolet lamp Diabase Japanese law twin Prismatic Ultraviolet light Diagenesis Japanese twin Prismatic cleavage Uneven Diamagnetic Jet Prospect Uneven fracture Diamagnetism Jewel Prospecting Unstable Diamondlike luster Jeweler Prospector UV Diaphaneity Jewelry Proton UV lamp Diaphanous K Pseudo Vanadates Diapir K-spar Pseudo-octahedral Variable formula Dichroic Karat Pseudo-octahedron Variety Dichroism Karst Pseudocube Vein Diffract Kimberlite Pseudocubic Vent Diffraction Kt Pseudohexagon Venting Diffused Lab Pseudohexagonal Vermeil Diffusion treatment Laboratory Pseudomorph Verneuil process Dike Labradoresce Pseudomorphed Vesicle Dimorph Labradorescence Pseudomorphism Vitreous Dimorphous Labradorescent Pt Vitreous luster Diorite Laccolith Pure Vitriol Dipyramid Lamellar Pyncnometer Volatilize Dipyramidal Laminated rock Pyramidal Volcanic Disilicates Lanthanides Pyritohedral Volcanic rock Dispersing Lapidaries Pyritohedron Volcanism Dispersion Lapidary Pyroelectric Volcano Dodecahedral Lattice Pyroelectricity Vug Dodecahedron Lava Pyrometallurgy Vulcanism Dollar Lenticular Pyrosilicates Waterworn Dolomite Light Pyroxene Waxlike luster Dolostone Light reflection Pyroxene group Waxy Double refraction Light refraction Quarried Waxy luster Doublet Limestone Quarries Weathered Doubly terminated Litmus paper Quarry Weathering Druse Locality Quartz group Wheat sheaf Drusy Lode Quartzite Wheat sheaves Druzy Longwave R.E.E. White light Dry lake Loupe Radial Widmanstatten lines Dry lake deposit Lubricant Radiating Widmanstatten pattern Ductile Luminesce Radiation Wires Ductilibility Luminescence Radical Wiry Ductility Luminescent Radioactive Wolframates Dull Luster Radioactivity X-ray Dull luster Lustrous Rare earth Xenolith Dump LW Rare earth elements Zeolite Dusting Macle Reflection Zeolite group Earth science Macrocrystalline Reflective Zoning Earthy