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Table Of Contents

Obsidian
Oligoclase
Olivine
Onyx
Opal
Orpiment
Orthoclase
Orthorhombic
Oxide
Oxidized zone
Pearly
Pectolite
Pegmatite
Penninite
Pentlandite
Perlite
Petalite
Petroleum
Phenakite
Phillipsite
Phlogopite
Phosphates
Pipe
Placer
Plagioclase
Playa
Plutonic rock
Polybasite
Polyhalite
Potash
Potassium argon dating
Prase
Precipitation
Prehnite
Proustite
Pseudomorph
Psilomelane
Pumice
Purpurite
Pyragyrite
Pyrite
Pyrolusite
Pyromorphite
Pyrope
Pyrophyllite
Pyroxenes
Pyrrhotite
Quartz
Realgar
Red Ochre
Replacement
Resinous
Rhodochrosite
Rhodocrosite
Rhodonite
Rhyolite
Ruby
Rutile
Sanidine
Sapphire
Scapolite
Scheelite
Schist
Schorl
Schwazite
Scolecite
Scoria
Scorodite
Secondary minerals
Sepiolite
Serpentine
Shale
Siderite
Silica
Silicates
Silky
Sillimanite
Silver
Skutterudite
Slate
Smithsonite
Sodalite
Sodium Tetraborate
Specific gravity
Sperrylite
Sphalerite
Sphene
Spinel
Spodumene
Staurolite
Stephanite
Stibnite
Stilbite
Strata
Streak
Striations
Strontianite
Sulphates
Sulphides
Syenite
Sylvanite
Sylvite
Tachylite
Tachylyte
Talc
Tenacity
Tetragonal
Tetrahedrite
Thenardite
Till
Tillite
Topaz
Torbernite
Tourmaline
Trachyte
Travertine
Tremolite
Triclinic
Trydimite
Tufa
Tuff
Turquoise
Twin
Ulexite
Umber
Uraninite
Vanadinite
Vein
Vermilion
Vesicle
Vesuvianite
Vitreous
Vivianite
Wavellite
Willemite
Witherite
Woolastonite
Wulfenite
Ytterbite
Zincite
Zircon
Zoisite