Greenschist
Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)
metamorphic
Category
Mineral (Biogenic)
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Granite
Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)
igneous
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Granite
Granite
igneous
Barite
Barium sulfate (BaSO4)
mineral
Gneiss
Gneiss
metamorphic
Porphyritic Basalt (Flower Stone)
Basalt with Feldspar phenocrysts
igneous
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)
mineral
Granite (Polished Pebble)
Phaneritic Plutonic Rock (primarily Orthoclase and Quartz)
igneous
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Granite
Intrusive igneous felsic rock
igneous
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Diamond (set in Gold)
Carbon (C)
mineral
Smoky Quartz on Feldspar (Granite Pegmatite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
igneous
Granite Cobble
Felsic Intrusive Igneous Rock (Granite)
igneous
Diamond (in Jewelry Setting)
Carbon (C) - Isometric-Hexoctahedral
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Greenstone
Greenschist (Greened Metabasalt)
metamorphic
Diamond (or Lab-Grown Cubic Zirconia)
Carbon (C)
mineral
Gneiss
Gneiss
metamorphic
Granite
Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))
igneous
Granite
Phaneritic plutonic rock (Felsic)
igneous
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
River Rock (Mossy)
Stream-rounded Clast (likely Siltstone or Sandstone with bryophytes)
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
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)
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Geode (Unopened)
Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)
sedimentary
Banded Slate (Sedimentary Pebble)
Slate (Metamorphosed Shale or Mudstone)
metamorphic
Sandstone
Arenite (SiO2 with various cementation agents)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Granite (Mainly Quartz SiO2 and Feldspar KAlSi3O8)
igneous
Gossan with Copper Carbonate (Chrysocolla/Malachite)
Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
Mineral/Sedimentary Interface
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic