River Stone (Basalt or fine-grained Schist)
Mafic Igneous Rock / Volcanic Basalt
Category
Browse carved stone specimens identified by the Rock Identifier community.
River Stone (Basalt or fine-grained Schist)
Mafic Igneous Rock / Volcanic Basalt
Gray Slate River Stone
Slate
Yellow Quartzite Pebble
Quartzite (primarily SiO2)
Tiger's Eye
Quartz Pseudomorph (SiO2 with inclusions of Crocidolite)
Petrified Wood
Petrified Wood (Silicified Wood)
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
Citrine
Silicon Dioxide (SiO2)
Tiffany Stone
Fluorite-bearing Opalized Breccia
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
Red Jasper (possibly with Hematite/Magnetite inclusions)
Silicon Dioxide (SiO2) with iron oxide inclusions
Pink Quartzite
Quartzite (SiO2 with iron oxide impurities)
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
Gneiss (specifically Banded Gneiss)
Gneiss
Zebra Jasper
Tainted Silicate (mainly Quartz/Chalcedony/Calcite)
Yellow Quartzite
Quartzite (SiO2 with iron oxide inclusions)
Gneiss (Hornblende/Biotite Gneiss)
Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)
Quartzite
Quartzite (SiO2)
Gneiss
Gneiss (Foliated Metamorphic Rock)
Greenstone
Metabasalt (often contains Chlorite, Actinolite, and Epidote)
Granite
Granite (Silicic Plutonic Rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Quartzite
Quartzite (SiO2)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Pink Quartzite
Quartzite (mainly SiO2 with iron oxide impurities)
Basalt
Basalt (Mafic volcanic rock)
Chert (often called Flint or River Rock)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Pink Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Granite (Pink/Red Orthoclase variety)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
Hag Stone
Perforated Sedimentary Rock
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
Basalt (Tumbled Massage Stone)
Extrusive Igneous Rock
Hag Stone
Perforated Sedimentary Rock (typically Flint or Limestone)
Chert (Field Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Basalt (River Stone)
Basalt
Basalt (River Stone)
Basalt (Mafic Extrusive Igneous Rock)
River Stone (River Rock)
Smooth Clastic Sedimentary Rock
Diorite
Phaneritic Intermediate Igneous Rock
Jasper
Jasper (Silicon Dioxide, SiO2)
Lepidolite
Lepidolite - K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Red Jasper
Silicon Dioxide (SiO₂)
Quartzite
Quartzite (SiO2)