Sagenitic Agate (with Goethite/Rutile inclusions)
Silicon Dioxide (SiO2) with hydrous ferric oxide inclusions
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
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Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (or Rhyolite)
Extrusive Igneous Rock with Vesicular Texture
igneous
Green fluorite (likely)
Fluorite, calcium fluoride (CaF₂)
mineral
Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)
Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Cobaltoan Calcite / Pink Dolomite (Possible)
Cobaltoan Calcite: (Ca,Co)CO3; Pink Dolomite (or Thulite): CaMg(CO3)2 or Mn-Dolomite / (Thulite: Mn2+3Al2(Si2O7)(SiO4)O(OH))
Mineral / Rock (depending on purity)
Amethyst
Crystalline Silicon Dioxide with Iron impurities (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
mineral
Ruby in Zoisite
Anyolite (Ruby in Zoisite)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrope Garnet (Bohemian Garnets)
Pyrope (from the group Mg3Al2(SiO4)3)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusion of AlAl6BSi3O18
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Chert (Cherty Limestone / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
metamorphic
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Blue Quartz with Graphite/Tourmaline Inclusions
Silicon Dioxide (SiO2) with Carbon (C) or Schorl elements
mineral
Epidote (Unakite variety)
Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Greenstone / Greenschist
Chlorite schist / Meta-basalt
metamorphic
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Gneiss (Pebble)
Gneiss
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8
mineral
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
mineral
Blue Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Chevron Amethyst
Silicon dioxide, SiO2 (Quartz variety)
Mineral
Quartz Druzy
Crystalline Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline)
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral