Gneiss (specifically a Banded Gneiss cobble)
Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Category
Mineral With Metamorphic Or Sedimentary Host
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
Arsenopyrite with Schist Matrix
Arsenopyrite (FeAsS)
mineral
Greenschist
Greenschist facies rock
Metamorphic
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite
mineral
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Quartz (beads)
SiO2 (Silicon Dioxide)
Mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Quartz (possibly milky quartz)
Quartz (Silica; SiO₂)
Mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite River Rock (with Limonite staining)
Quartzite (SiO2)
metamorphic
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
metamorphic
Red Jasper (Amygdaloidal Basalt with Agate)
Silicon dioxide (SiO2) in Basalt host
igneous
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Garnet Schist
Almandine-Muscovite Schist
metamorphic
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Slate
Foliated Metamorphic Rock
metamorphic
River Pebble (Quartzite)
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Graphite
Graphite (C)
mineral
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (likely tumbled or naturally water-worn)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
metamorphic
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Mica Schist (with Muscovite)
Muscovite/Quartz Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)
Mineral (variety of Chalcedony)
Quartz (Pebble)
Quartz (SiO₂)
Mineral
White Quartz
Quartz (SiO2)
Mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral