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