Mineral On Sedimentary Rock

Diorite (River Cobble)

Intermediate plutonic igneous rock

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)

Olivine Basalt

Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)

Blue Calcite

Calcium Carbonate (CaCO3)

Orange Calcite

Calcium Carbonate (CaCO3)

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Orthoclase (Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Coarse-grained Granite

Phaneritic Granite (contains Quartz, Feldspar, and Mica)

Basalt

Mafic Igneous Rock

Diorite (Spotted or Dalmatian Stone pattern)

Diorite

Basalt (Weathered Pebble)

Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Amethyst on Agate/Basalt Matrix

Silicon Dioxide (SiO2) with iron impurities

Quartz (specifically Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Garnet-Bearing Schist

Almandine Garnet Micaceous Schist

Granite

Granite (Felsic Plutonic Rock)

Coarse-grained Quartz with Feldspar inclusions

Crystalline Quartz (SiO2) with Orthoclase/Plagioclase Feldspar inclusions

Undetermined Due to Blur (Possible Flesh-Tone Mineral)

Unknown (Insufficient Visual Clarity)

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Banded Chert (Ironstone/Jasper)

Cryptocrystalline Quartz (SiO2) with Iron Oxides

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (Mafic volcanic rock)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Clear Quartz

Silicon Dioxide (SiO2)

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Lake Superior Agate

Cryptocrystalline Quartz (SiO2)

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)

Quartzite

Quartzite (primarily SiO2)

Pyrite

Iron Disulfide (FeS2)

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Igneous Rock)

Copper Ore (with Malachite and Azurite)

Hydroxide copper carbonate (Cu2CO3(OH)2 / Cu3(CO3)2(OH)2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Calcite

Calcite (CaCO3)

Coarse Sandstone

Arenite (SiO2 based)

Chatoyant Quartz (Cat's Eye Quartz)

Silicon Dioxide (SiO2) with fibrous inclusions of Amphibole or Rutile

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Quartz Pebble)

Silicon Dioxide (SiO2)