Blue Topaz
Al2SiO4(F,OH)2
mineral
Community gallery
All rocks & minerals
Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
sedimentary
Quartzite (Meta-sedimentary)
Quartzite (SiO2)
metamorphic
Quartz Cobble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Labradorite
(Ca,Na)(Al,Si)4O8
mineral
Milky Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Banded Gneiss
Gneiss
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8) with inclusions of Albite
mineral
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Diorite (Pebble)
Diorite
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Basalt
igneous
Nuummite
Antigorite-Anthophyllite complex
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Labradorite Granite (Blue Pearl)
Anorthosite (dominated by Labradorite feldspar)
igneous
Chert (Cream Variety)
Microcrystalline silica (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Biotite on Quartz
Biotite Mica (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Siltstone
Siltstone
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Riverstone (Gray Basalt)
Basalt (Maier-type or generic)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt Scoria
Scoria (vesicular basalt)
igneous
Granite Cobble
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Amber
Succinates (C10H16O)
mineraloid