Rhinestone
Artificial Glass/Crystal
gemstone
Category
Crystal
Browse crystal specimens identified by the Rock Identifier community.
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Septarian Nodule with Calcite
Septarian Concretion (CaCO3 with internal calcite crystals)
sedimentary
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz crystals
sedimentary
Druzy quartz on matrix
Quartz (SiO₂), microcrystalline crystal coating
mineral
Amethyst crystal
Quartz (SiO₂), purple variety colored by trace iron and irradiation
mineral
Clear quartz crystal
Quartz (SiO₂), likely a natural crystal point
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone
Likely citrine (yellow quartz) crystal
Quartz, SiO₂; identification is tentative from the photo
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Natural Diamond (Faceted)
Diamond (pure carbon crystal, C)
mineral
Milky quartz crystal
Quartz, silicon dioxide (SiO₂), likely a small prismatic crystal or crystal fragment
mineral
Quartz geode
Microcrystalline quartz (chalcedony) with drusy quartz crystals; SiO₂
mineral
Amethyst crystal
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation
mineral
Green fluorite crystal
Fluorite (calcium fluoride, CaF₂)
mineral
Citrine Quartz (Carved Point)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst crystal
Silicon Dioxide (SiO2) with iron impurities
mineral
Likely garnet crystal (rough fragment)
Garnet group; possibly almandine, Fe₃Al₂(SiO₄)₃
mineral
Quartz crystal
Quartz (SiO₂), likely milky or iron-stained quartz
mineral
Clear quartz crystal
Quartz, silicon dioxide (SiO₂)
mineral
Green fluorite crystal
Fluorite (calcium fluoride, CaF₂)
mineral
Rose quartz (rough)
Quartz, SiO₂; trigonal crystal system
mineral
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Likely raw emerald or green beryl
Beryl, Be₃Al₂Si₆O₁₈; green color typically from chromium or vanadium
gemstone
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Rock crystal (clear quartz), possibly cloudy quartz
Quartz, silicon dioxide (SiO₂)
mineral
Quartz vein in foliated metamorphic rock
Likely quartz-bearing schist or gneiss; visible crystal is quartz (SiO₂)
metamorphic
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Cut quartz crystal (likely rock crystal)
Quartz, silicon dioxide (SiO₂), trigonal crystal system
gemstone
White drusy quartz
Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals
mineral
Amethyst (rough crystal)
Quartz, SiO₂; purple color commonly caused by iron impurities and natural irradiation
mineral
Amethyst crystal fragment
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron and irradiation
gemstone
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz Crystals on Clastic Sedimentary Rock
sedimentary
Purple amethyst crystal specimen
Amethyst, purple variety of quartz (SiO₂)
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Quartz crystal
Quartz (Silicon dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2) / Rock Crystal
mineral
Clear Quartz
Silicon Dioxide (SiO2) / Rock Crystal
mineral
Amethyst crystal
Quartz, SiO₂; purple variety colored mainly by iron impurities and irradiation
mineral
Calcite crystal aggregate
Calcite (CaCO₃), likely cave or hydrothermal carbonate formation
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone