Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Metamorphic Rock
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Unakite
Epidotized Granite (composition: K-feldspar, Epidote, and Quartz)
metamorphic
Quartzite (River-worn Shiner)
Quartzite (Formula: SiO2)
metamorphic
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Potassium Feldspar
K-Feldspar (KAlSi3O8)
mineral
Jasper River Stone
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Thunderegg (Ate Agate/Jasper Geode)
Silicon Dioxide (SiO2) within Rhyolite/Perlite matrix
sedimentary/igneous intermediary
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
sedimentary
Quartz Pebble
Crystalline Silica (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (River Rock)
Afanitic Vesicular Basalt
igneous
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)
sedimentary
Granite with Quartz Vein
Granite
Igneous
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
New Jade (Serpentine)
Antigorite / Serpentine group (Mg3Si2O5(OH)4)
metamorphic
Black Agate
Silicon Dioxide (SiO2) with carbon/iron inclusions
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium impurities
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz (Drusy/Crystalline)
Silicon Dioxide (SiO2)
mineral
Aquamarine with Ruby Accent
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite / Ca5(PO4)3F
mineral
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
mineral
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Agate
Cryptocrystalline quartz (SiO2)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
River Stone (River Rock)
Smooth Clastic Sedimentary Rock
sedimentary