Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Orange Calcite

Calcium Carbonate (CaCO3)

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Pyrite on Quartz matrix

Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)

Chert (Hagstone/Adder Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Limonite (Iron Ore)

Limonite (unstructured hydrated iron(III) oxide-hydroxides, often FeO(OH)·nH2O)

Chondrite Meteorite

L3 Chondrite (Unequilibrated Ordinary Chondrite)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Pyrite

Iron Pyrite (FeS2)

Basalt (Vesicular/Scoriaceous)

Extrusive Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)

Basalt (Weathered/Tumbled)

Extrusive Mafic Igneous Rock

Granite River Rock

Phaneritic Felsic Igneous Rock (Granite)

Blue Dyed Agate

Silicon Dioxide (SiO2)

Malachite

Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)

Diorite (River Pebble)

Intermediate plutonic igneous rock

Ruby (Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Sandstone with Liesegang Rings

Arenite with secondary Iron oxide (Limonite/Goethite) precipitation

Basalt

Basalt (composition of plagioclase, pyroxene, and olivine)

Azurite-Malachite (often called Azerite Malachite or Azurmalachite)

Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety

Basalt

Basalt (Mafic volcanic rock)

Granite Cobble

Phaneritic Plutonic Felsic Rock

Chert

Chert (SiO2)

Hematite (Iron Ore)

Hematite (alpha-Fe2O3)

Turquoise (Dyed Howlite/Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Target mineral) / Ca2B5SiO9(OH)5 (Actual specimen: Howlite)

Basalt with Quartz/Feldspar Inclusions

Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining

Amygdaloidal Basalt with Quartz/Zeolite Infill

Amygdaloidal Basalt (extrusive volcanic rock with SiO2 or CaAl2Si3O10·3H2O infill)

Sandstone (with banding)

Arenite (primarily SiO2)

Geode (unopened)

Calcedony-lined Geode (SiO2)

Pyritic Quartzite

Metequartzite with FeS2 (Pyrite) inclusions

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Quartz Geode

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Native Copper

Native Copper (Cu)

Ironstone Concretion (Limonite/Hematite Nodules)

Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (Lithic Sandstone)

Ironstone (likely Limonite or Goethite)

Ferruginous sedimentary rock (FeO(OH)·nH2O)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities