Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Category
Sedimentary Or Igneous Associated Mineral
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
metamorphic
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
mineral
Amethyst
Amethyst (SiO2 - Silicon Dioxide with iron impurities)
mineral
Carnelian Agate
Carnelian (Silicon Dioxide: SiO2) with iron oxide impurities
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Zircon
Zircon (ZrSiO4)
Mineral
Moss Agate
SiO2 (Silicon Dioxide) with dendritic inclusions
Mineral
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
African Turquoise (Jasper)
Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)
Rock
Gneiss
Gneiss
metamorphic
Serpentinite
Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)
metamorphic
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Mineral
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Green Aventurine and Clear Quartz
Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)
Mineral
Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)
SiO2 with TiO2 inclusions (Quartz with Rutile)
Mineral
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
sedimentary
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Malachite
Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)
Mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)
Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates
igneous, sedimentary, and metamorphic
Red Jasper (beads)
Silicon Dioxide (SiO2) with iron inclusions
Sedimentary Rock
Clear Quartz (beads in a bracelet)
Quartz (SiO2)
Mineral
Chert (Flint)
Chert (microcrystalline quartz)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Porphyry (Flower Stone)
Porphyry (Andesite or Basalt matrix)
igneous
Garnet (likely Almandine or a blend)
Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.
Mineral
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Unakite
Epidotized Granite
metamorphic
Epidotite (Unakite variety)
Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Unakite
Epidotized Granite
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral