Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Quartzite Pebble

Quartzite (primarily SiO2)

Sandstone

Clastic Sedimentary Rock (composed of SiO2 grains)

Chert (Banded Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Epidote (with Quartz and Feldspar)

Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)

Chrysocolla in Quartz (Gem Silica)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Quartzite Cobble

Quartzite (primarily SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Basalt River Pebble

Basalt (Aphanitic Mafic Volcanic Rock)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide - SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Chrysocolla in Malachite

Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Native Copper

Native Copper (Cu)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Gozzan/Ironstone)

Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)

Chrysocolla

Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O

Red Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2) with macrocrystalline Quartz veins

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Manganese Ore (Psilomelane/Pyrolusite)

Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

Banded Sandstone (Liesegang Rings)

Sedimentary sandstone with Iron oxide precipitates

Quartzite Pebble (River Rock)

Quartzite (mainly SiO2)

Chert (specifically a Worked Flint/Knapped Flake)

Chert / Flint (Microcrystalline Quartz, SiO2)

Chert / Flint

Chert (varieties include Flint)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Basalt River Stone

Basalt (Aphanitic Mafic Igneous Rock)

Diamond

Diamond (pure carbon, C)

Azurite Geode

Azurite (Cu3(CO3)2(OH)2)

Amethyst (as a jewelry accent)

Amethyst (Silicon Dioxide SiO2 with Iron impurities)

Basalt

Basalt (Mafic volcanic rock)

Banded Rhyolite (likely Green Jasper/Agate variety)

Silicon Dioxide (SiO2) with mineral inclusions

K2 Jasper (K2 Granite)

Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)

Quartz (Milky/Crystal variety)

Silicon Dioxide (SiO2)

Ironstone (likely Limonite or Goethite nodule)

Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)

Hematite (Iron Ore)

Hematite (Fe2O3)

Chrysocolla in Cuprite (Sonoran Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)

Fluorite, Turquoise, and Calcite set

Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)