Quartzite
Quartzite (SiO2)
metamorphic
Category
Sedimentary (Chemical)
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Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Cobble
Quartzite (SiO2 based)
metamorphic
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Quartzite with Iron Inclusions
Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite
metamorphic
Quartzite (River Stone)
Silicon Dioxide (SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite with Quartz Vein
Quartzite (primarily SiO2)
metamorphic
Riverstone Quartzite
Quartzite (primarily SiO2)
metamorphic
Kidney Stone (Renal Calculus)
Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O
mineral
Banded Iron Formation (BIF)
Banded Iron Formation
Sedimentary Rock
Quartzite Arrowhead
Quartzite (SiO2 silicon dioxide)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Rough Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Water-Worn)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Quartz (Milky/Common variety)
Silicon Dioxide (SiO2)
mineral
Gold
Native Gold (Au)
Mineral
Quartz (specifically Citrine or Yellow Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Quartz (Sand Grain size)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Lunar Meteorite (Feldspathic Breccia)
Lunar Achondrite (Regolith Breccia)
igneous
Quartzite
Metamorphic Sandstone (SiO2)
metamorphic
Quartz (Microcrystalline Gravel)
Silicon Dioxide (SiO2)
mineral
Quartz (Gray/Smoky Variety)
Silicon Dioxide (SiO2)
mineral
Gabbro
Gabbro
igneous
Red Quartzite / River Cobble
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Gold
Native Gold (Au)
mineral
Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Gold
Native Gold (Au)
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz Pebble (Grit)
Silicon Dioxide (SiO2)
mineral
Vesicular Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Azurite-Malachite with Limonite
Cu3(CO3)2(OH)2 (Azurite) / Cu2CO3(OH)2 (Malachite)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic