Mixed mineral and rock collection
Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones
mineral
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
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Mixed river gravel (alluvial conglomeratic sediment)
Polymictic alluvium; composition includes quartz, feldspar, chert, granite, basalt, and metamorphic rock fragments
sedimentary
Mixed Gravel and Pebbles
Polylithic Alluvial Aggregate
igneous, sedimentary, and metamorphic mix
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
River Quartzite Slik
Quartzite (SiO2)
metamorphic
Quartzite (with Quartz Veining)
Quartzite (SiO2)
metamorphic
Gneiss Pebble
Gneiss
metamorphic
Quartz (likely) or a Quartzite Pebble
Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.
Mineral, specifically a detrital grain
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
![Lapis Lazuli (polished cabochon/sphere) (Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)) — metamorphic](https://media.rockidentification.com/b91a3e06-35c6-4bff-89d1-02a020c00303-thumbnail.jpg)
Lapis Lazuli (polished cabochon/sphere)
Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)
Copper-bearing polymetallic mineral aggregate (Cu-minerals)
mineral
Quartzite Pebble
Meta-quartzite (SiO2)
metamorphic
Gneiss
Felsic banded gneiss, chiefly quartz–feldspar–mica
metamorphic
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Quartzite Cobble
Metamorphic Rock (SiO2 dominated)
metamorphic
Epidosite (Unakite-related)
Epidosite (composed primarily of Epidote and Quartz)
metamorphic
Gemstone Ring
Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)
gemstone
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
metamorphic
Quartz Sand Grain / Micro Crystal
Silicon Dioxide (SiO2)
mineral
Quartzite (River Cobble)
SiO2 (Quartz-rich Metamorphic Rock)
metamorphic
Quartzite River Rock
Metamorphic Rock (Quartzite)
metamorphic
Serpentine (polished/tumbled)
Serpentine-group minerals, chiefly antigorite, Mg₃Si₂O₅(OH)₄
metamorphic
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Marble
Metamorphic rock primarily composed of Calcite (CaCO3)
metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Ventifact
Eolian Ventifact (often composed of basalt, chert, or quartzite)
sedimentary
Gneiss
Gneiss
metamorphic
Greenschist
Greenschist facies metamorphic rock
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Lapis Lazuli (Raw)
Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)
metamorphic
Basalt
Basalt
Igneous
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Quartz Vein in Rhyolite
Silicon Dioxide (SiO2) in extrusive igneous rock
igneous