Quartz (Microcrystalline Fragment)
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Extraterrestrial)
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Quartz
Silicon Dioxide (SiO2)
mineral
N/A (Non-Geological Object)
N/A
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Biotite Granite
Phaneritic Felsic Igneous Rock
igneous
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Variscite (or potentially a turquoise/variscite matrix cabochon, or an impression jasper)
AlPO4·2H2O (Variscite) or related phosphate/silicate material depending on exact composition
Mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Howlite and Purpurite druzy
Calcium Borosilicate Hydroxide (Howlite) and Manganese Phosphate (Purpurite)
mineral
Tumbled Moonstone
Feldspar (Orthoclase/Albite), KAlSi3O8
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
sedimentary
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Satin Spar (Satin Spar Selenite)
Gypsum (CaSO4·2H2O)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Concretion or Geode (unbroken)
Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.
Sedimentary rock (specifically a concretion or possibly a geode)
Dinosaur Bone (Fossilized)
Permineralized Bone (CaCO3 or SiO2 after Hydroxylapatite)
sedimentary
Pink Halite (Himalayan Salt)
Halite (Sodium Chloride, NaCl)
sedimentary
Diamond
Diamond (C)
mineral
Diamond
Diamond (Pure Carbon - C)
mineral
Diamond
Carbon (C)
mineral
Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Diamond
Carbon (C)
mineral
Raw Diamond
Carbon (C)
mineral
Gold and Diamond
Native Gold (Au) and Diamond (C)
mineral
Prehnite on Basalt
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Chrysocolla on Quartz
Chrysocolla (Cu2−xAlx(H2−xSi2O5)(OH)4·nH2O) often associated with Quartz (SiO2)
mineral
Sandstone (River Cobble)
Clastic Sedimentary Rock (primarily Quartz with Feldspar)
sedimentary
Banded Slate (Sedimentary Pebble)
Slate (Metamorphosed Shale or Mudstone)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Hag Stone
Perforated Sedimentary Rock (typically Limestone or Sandstone)
sedimentary
Gossan with Copper Carbonate (Chrysocolla/Malachite)
Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
Mineral/Sedimentary Interface
Granite
Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Schist
Mica Schist
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral