Organic Gemstone (Fossilized Resin)

Jasper (specifically Brecciated or Agated Jasper)

Silicon Dioxide (SiO2) - Chalcedony with impurities

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

Unakite (or Epidotized Granite)

Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)

Rhodonite in Quartz Matrix

Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)

Jasper (specifically Yellow and Red Jasper/Chert)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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)

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