Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Category
Mineral (Tectosilicate)
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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
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
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
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Schist
Mica Schist
metamorphic
Green Aventurine
Aventurine (variety of Quartz - SiO2)
Mineral_Rock
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Manganese Dendrite on Siltstone
Manganese Oxide (pyrolusite or psilomelane) Dendrites
mineral/sedimentary
Pink Halite (Himalayan Salt)
Halite (Sodium Chloride, NaCl)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
mineral
Milky Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2)
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Diamond
Carbon (C)
mineral
Magnetite
Magnetite (Fe3O4)
mineral