Organic Materia (Not A Rock Or Mineral)

Sandstone

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Red)

Arenite (SiO2 with Fe2O3)

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide staining)

Dalmatian Stone

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Ferruginous Sandstone

Sandstone (rich in iron oxides/hydroxides)

Pyrite in Matrix (Quartz/Schist)

Iron Sulfide (FeS2)

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Banded Gneiss

Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)

Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Dendrite (Manganese Oxide Dendrites)

Psilomelane or Pyrolusite on Matrix (typically MnO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO₂)

Clear Quartz Sphere

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Granite

Granite (a felsic intrusive igneous rock)

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Amethyst

Amethyst (Silica mineral, SiO2)

Tumbled Stones (various)

Mixed Silica-based Minerals (primarily Quartz and Chalcedony)

Granite

Intrusive igneous rock (Acidic)

Granite

Granite (Felsic Plutonic Rock)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Basalt

Extrusive mafic igneous rock

Druzy Quartz

Silicon Dioxide (SiO2)

Iolite-bearing Gneiss (Cordierite)

Cordierite (Mg2Al4Si5O18) in Gneiss matrix

Caribbean Calcite

Calcium Carbonate with Argonite (CaCO3)

Serpentinite

Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)

Pink Granite

Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)

Biotite Mica

K(Mg,Fe)3AlSi3O10(OH)2

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Olivine (Peridotite)

(Mg, Fe)2SiO4 (Magnesium Iron Silicate)

Granite

Phaneritic Felsic Igneous Rock

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Granite (specifically Pink or Alkali Feldspar Granite)

Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)