Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Metamorphic
Category
Mineral Like Biological Tissue
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Bauxite
Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)
sedimentary
Blue Howlite (Dyed)
Dyed Howlite (Calcium Borosilicate Hydroxide, Ca2B5SiO9(OH)5)
mineral
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Sandstone (Quartzose Sandstone / Feldspathic Sandstone)
SiO2 with minor impurities (Fe2O3, KAlSi3O8)
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Green Fluorite
Calcium fluoride (CaF2)
mineral
Barite Rose
Barium Sulfate (BaSO4)
mineral
Tree Agate
Silicon Dioxide (SiO2) with Chlorite/Manganese inclusions
sedimentary
Native Copper in Basalt
Cuprum (with Host Basalt)
igneous
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Quartzite with Hematite staining
Metamorphic Quartz (SiO2) with Ferric Oxides
metamorphic
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide + Fe2O3 / FeO(OH))
mineral
Septarian Nodule (Thunder Egg variant)
Septarian concretion (Calcite, Aragonite, and Limestone)
sedimentary
Quartz Mineral Specimens
Quartz (Silicon Dioxide, SiO2)
mineral
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
mineral
Amygdaloidal Basalt
Extrusive mafic igneous rock with amygdules
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Gneiss
Gneiss
metamorphic
Blue Crackle Quartz (Dyed Fire Agate/Quartz)
Silicon Dioxide (SiO2) with artificial dye treatment
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Rose Quartz
Silicon dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
gemstone
Epidote in Quartz
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Milky Quartz (SiO2)
metamorphic
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica (likely on Quartz/Feldspar)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Sunstone
Aventurine Feldspar (Plagioclase Feldspar with inclusions)
mineral
Banded Serpentine
Serpentine group (subgroup Lizardite or Antigorite) - Mg3Si2O5(OH)4
metamorphic
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Banded)
Cryptocrystalline Silica (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone (Ferruginous Concretion)
Ferruginous Sandstone Concretion / SiO2 with Fe2O3 cement
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral