Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Metamorphic Or Sedimentary Depending On Local Grade
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Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Schist
Mica Schist (Composition typically involves Muscovite, Biotite, Quartz, and Feldspar)
metamorphic
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)
metamorphic
Jadeite Jade
Jadeite (NaAlSi2O6)
metamorphic
Greenschist (containing Epidote and Quartz)
Greenschist (Epidote-Chlorite-Actinolite Schist)
metamorphic
Milky Quartz with Nephrite Jade
Silicon Dioxide (SiO2) with Ca2(Mg,Fe)5Si8O22(OH)2
mineral/metamorphic
Tiger Iron / Banded Iron Formation
Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)
metamorphic
Phyllite
Phyllite (Foliated metamorphic rock)
metamorphic
Unakite
Epidotized Granite
metamorphic
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Mineral
Slate
Foliated metamorphic rock
metamorphic
Banded Gneiss
Gneiss (variable mineral composition)
metamorphic
Rough Aquamarine
Beryl (Be₃Al₂Si₆O‑₁₈)
mineral
Agate
SiO2
mineral
Quartz (Milky/Common variant)
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite (Highly Metamorphosed Coal)
sedimentary
Jade (Jadeite/Nephrite)
NaAlSi2O6 (Jadeite) / Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite)
metamorphic
Marble
Recrystallized Limestone (CaCO3)
metamorphic
Banded Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Greenschist
Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)
metamorphic
Rough Green Beryl (Emerald variety)
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Petrified Wood
Silicified wood (primarily Quartz/Chalcedony, SiO2)
metamorphic
Epidote (likely Pistacite in Epidosite rock)
Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Fuchsite Gneiss or Schist
Muscovite (variety Fuchsite) within Metamorphic Host Rock
metamorphic
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Aquamarine (Pendant) and Jasper (Beads)
Beryllium aluminum silicate (Be3Al2Si6O18) with Chalcedony (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Epidote
Calcium aluminum iron silicate hydroxide (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
sedimentary
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Green Slate (Greenstone)
Metamorphic shale (varied composition)
metamorphic