Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Quartz Geode

Silicon Dioxide (SiO2) in a Geode body

Quartz (Milky or Smoky Quartz)

Quartz (Silicon Dioxide, SiO2)

Chert (specifically Yellow or Brown Chert / Jasper)

Silicon Dioxide (SiO2)

Malachite

Copper(II) carbonate hydroxide [Cu2CO3(OH)2]

Quartz Vein in River Siltstone

Crystalline Quartz (SiO2) in Siliclastic Matrix

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and K-feldspar)

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone Concretion

Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)

Yellow Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Agate (Chalcedony)

Cryptocrystalline Silica or Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Jasper

Silicon dioxide (SiO2)

Chrysocolla

Chrysocolla - (Cu,Al)2H2Si2O5(OH)4·nH2O

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Botryoidal Hematite (Iron Stone Conglomerate)

Hematite (Fe2O3) in sedimentary matrix

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide with impurities (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Sandstone (Pet Rock)

Clastic sedimentary rock (primarily SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and/or Biotite composition)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Native Copper

Native Copper (Cu)

Lepidolite

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

Chert (Yellow/Tan Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Botryoidal Hematite (Kidney Ore)

Iron(III) oxide (Fe2O3)

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities

Green Calcite

Calcite (CaCO3)

Vesicular Basalt with Secondary Mineral Inclusions

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Carnelian Agate

Silicon Dioxide (SiO2) with Iron Oxide impurities

Dragon Blood Jasper (Epidote with Piedmontite or Quartz)

Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))

Chrysocolla

Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Chrysocolla in Quartz (Quantum Quattro variant)

Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) often mixed with SiO2

Specular Hematite with Quartz

Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)

Quartz (Milky Quartz pebble)

Silicon Dioxide (SiO2)