Basalt Pebble
Basalt (Mafic volcanic rock)
igneous
Community gallery
All rocks & minerals
Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.
Sandstone Concretion
Clastic Sedimentary Rock - Quartz Arenite / Sandstone
sedimentary
Basalt (River Stone)
Basalt (SiO2 range 45-52%)
igneous
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Cat's Eye Chrysoberyl
Chrysoberyl (BeAl2O4)
mineral
Ruby
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Rhodolite Garnet
Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Phaneritic Igneous Rock)
igneous
Granite
Phaneritic Plutonic Felsic Rock (KAlSi3O8 + SiO2 + NaAlSi3O8)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Igneous Rock (Granite)
igneous
Greenstone
Metabasalt (Greenstone Facies)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Granite
Phaneritic Igneous Rock (Granite)
igneous
Chert / River Cobble
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic glass (SiO2)
igneous
Crinoid Columnal Fossil
Crinoid ossicle (Class Crinoidea)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian Agate
SiO2 (Silicon Dioxide with Iron Oxide impurities)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
sedimentary
Cullet Glass (Slag)
Amorphous Silicon Dioxide (Man-made)
Mineraloid
Cream River Jasper
Silicified microcrystalline quartz (SiO2)
sedimentary
Blue Onyx (Dyed Agate/Chalky Chalcedony)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granite
Phaneritic plutonic rock (SiO2 > 69%)
igneous
Banded Agate (Geode Fragment)
Silicon Dioxide (SiO2) - Variety Agate
mineral
Milky Quartz
Quartz (SiO2)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with iron and other mineral inclusions
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Rose Quartz with Girasol Effect
Silicon Dioxide (SiO2)
mineral
Red Sandstone Pebble
Arenite with Hematite (Fe2O3) cement
sedimentary