Rocks and Minerals (O-Z)

Table Of Contents

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