Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Jasper (Banded Argillite/Chert mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

Pink Granite

Granite (Phaneritic igneous rock composed mainly of quartz, alkali feldspar, and plagioclase)

Quartzite with Iron Inclusions

Quartzite (primarily SiO2 with Fe2O3 impurities)

Agate

Chalcedony (cryptocrystalline variety of Quartz, SiO2)

Gold

Native Gold (Au)

Pyrite (on Quartz matrix)

Iron Sulfide (FeS2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Chert (Cherty Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Quartz Pebble

Silicon Dioxide (SiO2)

Gemstone Sand (Mineral Assortment)

Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Malachite

Malachite (Cu2CO3(OH)2)

Banded Gneiss

Gneiss (Metamorphic Rock)

Carnelian (Chalcedony)

Cryptocrystalline Quartz (SiO2) with Iron Oxide impurities

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Pyrite

Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Chert (specifically Pink Chert or Jasperized Chert)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Blue Chalcedony Geode (with Quartz Druzy)

Silicon Dioxide (SiO2) - Microcrystalline variety of Quartz

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Aragonite (Sputnik habit)

Aragonite (Calcium Carbonate, CaCO3)

Chert (Red/Brown Variety)

Microcrystalline quartz (SiO2)

Optical Calcite (Iceland Spar)

Calcite (CaCO3)

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Rough Diamond

Diamond (pure Carbon, C)

Malachite

Malachite, Cu2(CO3)(OH)2

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Jasper River Pebble

Silicon Dioxide (SiO2)

Chert (varieties: Flint or Jasper)

Microcrystalline Quartz (SiO2)

Chert (Nodule)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Chert / Flint (with quartz or calcite inclusion)

Silicon dioxide (SiO2)

Lepidolite with Rubellite Tourmaline

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite mica)

Basalt with Quartz Veining

Amygdaloidal Basalt (predominately SiO2 and (Na,Ca)(Si,Al)4O8)

Chert (and/or Chalcedony)

Microcrystalline Silica (SiO2)

Rough Quartz (likely Rose or Amethyst variety)

Silicon Dioxide (SiO2)

Manganese-coated Sandstone

Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)