Sandstone
Arenite (SiO2 predominantly)
sedimentary
Category
Mineral Health
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Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Vesicular Basalt
Vesicular Basalt (rich in silicate minerals mostly Plagioclase and Pyroxene)
igneous
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic
Schist (with Iron Oxide)
Mica Schist
metamorphic
Pyrite in Shale
Iron Sulfide (FeS2) in Sedimentary Matrix
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Shale
Shale (Lutite)
sedimentary
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
mineral
Cinnabar
Mercury(II) sulfide (HgS)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Amygdaloidal Rhyolite (often called Lake Superior Agate relative)
Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Eudialyte in Matrix
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
sedimentary
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Quartz Pebble (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Ferruginous Quartz (Iron-Stained Quartz)
Quartz (Silicon Dioxide) with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Red Ochre (Hematite-rich Clay)
Limonitic/Hematitic Claystone (Fe2O3 with clay minerals)
Sedimentary
Jasper or Agate with Chlorite Inclusions
Silicon Dioxide (SiO2) with Chlorite group minerals
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Copper Ore
Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock including secondary mineral infills)
Igneous
Man-made Slag (Industrial Byproduct)
Anthropogenic Glassy Residue
not a natural rock
Schist
Mica Schist
metamorphic
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
mineral
Kyanite (Green and Blue varieties)
Kyanite (Al2SiO5)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Greywacke (River Slikenside)
Greywacke (Lithic Sandstone)
sedimentary
Granite (Light-colored quartz/feldspar variety)
Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)
igneous
Citrine
Quartz (SiO₂) variety
Mineral
Aventurine (likely Green Aventurine)
Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)
Mineral
Chakra Stone Bracelet (mixed gemstones)
Multi-mineral/Gemstone assembly (primarily Quartz variety beads)
mineral
Magnetite with Pyrite or Chalcopyrite inclusions
Magnetite (Fe3O4) with Pyrite (FeS2)
mineral