Clear quartz crystal (likely tumbled or naturally worn)
Quartz, silicon dioxide (SiO₂)
mineral
Category
Crystal
Browse crystal specimens identified by the Rock Identifier community.
Geode with Quartz Crystal Cavity
Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Aquamarine
Beryl (Be₃Al₂Si‑₆O₁‑₈)
mineral
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Green Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Coating
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
gemstone
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Raw quartz crystal cluster (likely chalcedony/quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Polished agate geode
Chalcedony (microcrystalline quartz, SiO₂) with quartz druse crystals
mineral
Pink tourmaline crystal (probable)
Elbaite tourmaline, Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Raw tourmaline crystal (probable schorl)
Tourmaline group; likely schorl, NaFe3+Al6(BO3)3Si6O18(OH)4
mineral
Tumbled milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
gemstone
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Native bismuth
Bismuth (Bi), commonly forming hopper crystals or aggregates
mineral
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Diamond
Carbon (C), specifically in an isometric crystal system.
Mineral
Clear quartz crystal (likely quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz crystal (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
White Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Agate Geode
Silicon Dioxide (SiO2) - Variety Agate with Quartz crystal center
mineral
Limestone with Calcite Crystals
Calcium Carbonate (CaCO3)
sedimentary
Scolecite
Scolecite (CaAl2Si3O10·3H2O)
mineral
White quartz crystal cluster
Quartz (silicon dioxide, SiO₂), likely milky quartz
mineral
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or iron-stained quartz
mineral
Quartz-lined vesicle in basalt (amygdaloidal basalt)
Amygdaloidal basalt with drusy quartz; predominantly plagioclase, pyroxene, and iron oxides
igneous
Aquamarine (Tumbled)
Beryl (Be3Al2Si6O18)
mineral
Goldstone (Brown)
Aventurine Glass (Silicon Dioxide infused with Copper crystals)
mineraloid (man-made glass)
Quartz crystal fragment in weathered host rock
Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix
mineral
Emerald in Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with trace Fe2+)
mineral
Emerald
Beryl (Be3Al2Si6O18) with trace amounts of Chromium and/or Vanadium
mineral
Geode with Quartz Crystals
SiO2 (Silicon Dioxide) in a geode formation
Sedimentary/Igneous (depending on host rock)
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
mineral
Rock Crystal Quartz
Quartz (SiO₂)
Mineral
Clear Quartz (Cut/Faceted Gemstone)
Silicon Dioxide (SiO2)
gemstone