Gemstone

Rose Quartz Bead

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

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Chert (Flint)

Chert (SiO2)

Jasper

Silicon dioxide (SiO2)

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Unakite

Epidotized Granite

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

Chert (Flint)

Chert (SiO2)

Raw Citrine

Citrine (Silicon Dioxide - SiO2)

Aquamarine

Beryl (Be3Al2Si6O18 with Iron traces)

Black Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Caribbean Calcite

Calcium Carbonate with Argonite (CaCO3)

Black Pearl (Tahitian-style Cultured Pearl)

Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)

Amethyst (Digital/Conceptual Representation)

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Red Jasper

Silicon dioxide (SiO2)

Quartz

Quartz (Silicon Dioxide, SiO2)

Chert (Yellow or Ochre Jasper variant)

Microcrystalline Quartz (SiO2)

Clear Quartz Point

Silicon Dioxide (SiO2)

Rough Sapphire

Corundum (Al2O3)

Fluorite

Calcium Fluoride (CaF2)

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

Milky Quartz

Silicon Dioxide (SiO2)

Amazonite

Potassium Feldspar (Microcline) - KAlSi3O8

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Quartz Pebble (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2)

Chrysocolla (with Quartz and Azurite)

Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]

Chert

Microcrystalline Quartz (SiO2)

Citrine (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Citrine

Quartz (SiO₂)

Tiger's Eye (Multicolor/Variegated)

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Tektite (Indochinite)

Tektite (Amorphous silica-rich impact glass)

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Nuummite

Nuummite (intergrowth of orthoamphiboles Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Yellow Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Tree Agate

Silicon Dioxide (SiO2) with Chlorite/Manganese inclusions

Jasper Shard / Chert

Silicon dioxide (SiO2)