Obsidian
Obsidian (Volcanic Glass)
Category
Browse metamorphic or igneous with mineral inclusion specimens identified by the Rock Identifier community.
Obsidian
Obsidian (Volcanic Glass)
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with dendritic inclusions
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Granite
Granite
Raw Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium)
Rose Quartz
Silicon Dioxide (SiO2)
Flower Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
Green Quartz (Prasiolite/Adventurine/Jasper)
Silicon Dioxide (SiO2)
Muscovite Mica
Muscovite / KAl2(AlSi3O10)(OH)2
Rhodonite
Rhodonite (MnSiO3)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Schist
Mica Schist (primarily Muscovite and Quartz)
Blue Quartzite
Blue Quartzite (Primary mineral: Quartz, SiO2 with magnesio-riebeckite or crocidolite inclusions)
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)
Basalt with Quartz/Zeolite Inclusions
Porphyritic Basalt (SiO2 with Aluminosilicates)
Snowflake Obsidian
Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)
Almandine Garnet
Fe3Al2(SiO4)3
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO₂)
Dalmatian Stone
Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)
Lapis Lazuli
Sodium aluminum silicate with sulfur (main component: Lazurite [(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2])
Milky Quartz
Silicon Dioxide (SiO2)
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
Schist
Mica Schist
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Yellow Quartz River Pebble
Silicon Dioxide (SiO2)
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Granite
Granite (compositional mixture of Quartz, Feldspar, and Mica)
Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)