Metamorphic (Likely Gneiss Or Schist Based On Texture)

Magnetite Orthorthotropic Rock

Magnetite (Fe3O4)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Smoky Quartz and Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Sandstone

Arenite (composed primarily of SiO2)

Epidote with Feldspar/Quartz (Unakite-like)

Epidotized Granite (Ca2(Al,Fe)3(SiO4)3(OH) + KAlSi3O8)

Sandstone (River Pebble)

Arenite

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Travertine (Tufa)

Calcium Carbonate (CaCO3)

White Marble

Recrystallized Calcite (CaCO3)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 primarily)

Quartz (Crystal Fragment)

Quartz / Silicon Dioxide (SiO2)

Rose Quartz (tumbled)

Rose Quartz (variety of Quartz, chemical formula SiO₂)

Nuummite

Orthoamphibole (mixture of Anthophyllite and Gedrite)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Epidote

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Epidote with Unakite characteristics

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Sandstone

Arenite (variable SiO2 composition)

Sandstone

Arenite (primarily SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Epidote (Unakite-related)

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Geode Nodules / Chalcedony Geode

Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz

Sandstone (Quartzose)

Arenite (primarily SiO2)

Tufa (Vesicular Limestone)

Tufa (form of Calcium Carbonate, CaCO3)

Yellow Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Sandstone

Arenite (SiO2 primarily)

Milky Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Sandstone

Arenite (SiO2 based)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Sandstone (with ripple marks)

Arenite (SiO2 primarily)

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Petrified Wood

Silicified Wood (SiO2)

Sandstone (Pebble)

Arenite / Clastic Sedimentary Rock

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Quartz-rich)

Arenite (SiO2 based)