Non Geological

Granite (specifically Pink or Alkali Feldspar Granite)

Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Fluorite (Purple Octahedron)

Calcium Fluoride (CaF2)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Granite (White Granite variant)

Phaneritic Plutonic Rock (High-silica Felsic)

Muscovite (White Mica)

Muscovite - Potassium aluminum silicate: KAl2(AlSi3O10)(F,OH)2

Pyrite

Iron Sulfide (FeS2)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Pyrite

Iron Sulfide (FeS2)

Diorite (Polished Tumble)

Diorite (Intermediate intrusive igneous rock)

Chert (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

Rose Quartz

Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Gabbro

Plutonic mafic rock

Quartzite (or Milky Quartz pebble)

Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Granite (specifically Pink or Red Granite)

Phaneritic Felsic Igneous Rock (Granite)

Andesite

Andesite

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide - SiO2)

Milk Quartz (White) and Yellow Aventurine (Yellow)

Silicon Dioxide (SiO2)

Quartz (specifically Milky/Yellow Quartz)

Silicon Dioxide (SiO2)

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Clear Quartz Cluster

Silicon Dioxide (SiO2)

Chert (often called Flint in this variation)

Silicon dioxide (SiO2) - Microcrystalline quartz

Granodiorite

Phaneritic intrusive igneous rock (Granodiorite)

Fluorite

Calcium Fluoride (CaF2)

Clear Quartz

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with iron silicate and iron oxide inclusions

Granite

Granite (Phaneritic igneous rock)

Quartz (Milky/Clear Quartz)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Calcite (Optical Grade/Iceland Spar)

Calcium Carbonate (CaCO3)

Epidote with Unakite characteristics

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

Chert (Jasper variety)

Cryptocrystalline quartz (SiO2)

Rough Quartz (with Feldspar inclusions)

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Quartzite

Metamorphosed Quartz Sandstone (primarily SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Iron-stained Quartzite

Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)

Dendritic Jasper (Bumblebee like Agate)

Silicon Dioxide with inclusions (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz