Tiny amber-colored crystal fragment
Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral
mineral
Category
Mineral With Metamorphic Or Sedimentary Host
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion
Sedimentary concretion
Sedimentary
Mixed Mineral Collection (with Quartz, Beryl, and host rock)
Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Milky Quartz in Gneiss
Quartzite / Foliated Gneiss containing SiO2
metamorphic
Quartz Vein
Silicon Dioxide (SiO2)
Mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Fossil gastropod in granite-like stone
Gastropoda indet.; enclosing rock likely polished granite or gneiss
fossil
Quartz Vein in Sandstone
Quartz (SiO2) in Clastic Sedimentary Rock
sedimentary
Dumortierite Quartz
Dumortierite in Quartz (SiO2 with Al7BO3(SiO4)3(O,OH)3)
mineral
Quartz with Calcite / Geode Fragment
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
mineral
Pyrite Geode (Sparkling Druzy)
Iron Sulfide (FeS2) in Sedimentary Nodule
mineral
Druzy Quartz Geode (Vug)
Silicon Dioxide (SiO2)
mineral
Raw greenish crystal/mineral fragment
Uncertain from image; possibly olivine (forsterite-rich), epidote, or green tourmaline
mineral
Dumortierite in Quartz
Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Agate
Cryptocrystalline Silica (SiO2)
mineral
Greenstone
Greenschist (composed of chlorite, actinolite, and epidote)
metamorphic
Raw quartz-rich rock, likely milky quartz
Quartz (silicon dioxide, SiO₂), possibly quartzite or a quartz-bearing host rock
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Matrix / Quartzite
Silicon Dioxide (SiO2) with host rock
metamorphic
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Schist with Quartz Vein
Mica Schist with Crystalline Quartz (SiO2)
metamorphic
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
Mineral
Quartz (Milky Quartz/Citrine Type)
Silicon Dioxide (SiO2)
mineral
Jasper or Agate pendant
Silicon dioxide (SiO2)
Mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz-veined Metamorphic Pebble
Silicate-rich metamorphic rock with quartz veins (SiO2)
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Greenstone / Greenschist
Greenschist (contains chlorite, epidote, actinolite)
metamorphic
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Quartz Vein (Iron-stained)
Silicon Dioxide (SiO2) with limonite/hematite staining
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Quartz Geode or Nodular Quartz
Silicon Dioxide (SiO2) in Host Matrix
mineral
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic