Mineral, Specifically A Variety Of Quartz

Tiger's Eye (specifically Blue Tiger's Eye / Falcon's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Dumortierite Quartz

Al7BO3(SiO4)3O3 (Aluminum borate silicate)

Serpentine

Serpentine-group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Hematite/Goethite)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz Geode

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Jasper (specifically Red or Brecciated Jasper variant)

Jasper (Microcrystalline Quartz - SiO2)

Chert (specifically Flint or Chalcedony nodule)

Microcrystalline Quartz (SiO2)

Rose Quartz

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

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Dalmatian Stone

Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)

Quartz Geode

Silicon Dioxide (SiO2)

Chert (specifically Jasper or Flint variety)

Cryptocrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2)

Granite

Plutonic felsic igneous rock

Citrine

Citrine (Silicon Dioxide, SiO2)

Tree Agate (or Moss Agate), faceted into a crystal tower

Dendritic Agate (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Rose Quartz (likely carved)

Rose Quartz (SiO2)

Orange Aventurine (Sunstone-style Quartzite)

Silicon Dioxide (SiO2) with Goethite or Hematite inclusions

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz (Chalcedony/Agate)

Silicon Dioxide (SiO2)

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Granite

Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)