Zebra Jasper
Silicon Dioxide (SiO2) with various inclusions
metamorphic/sedimentary
Category
Metamorphic (Man Made)
Browse metamorphic (man made) specimens identified by the Rock Identifier community.
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
sedimentary
Quartz (likely a form of massive or vein quartz)
Quartz (SiO₂)
Mineral
Green Aventurine and Clear Quartz
Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)
Mineral
Moonstone
Adularia (orthoclase feldspar variety)
mineral
Dendritic Agate (or Dendritic Opal)
SiO2 (for Agate), SiO2·nH2O (for Opal)
Mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, with varying amounts of Calcite, Pyrite, and Sodalite).
Mineral
Granite (weathered)
Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Limonitic Sandstone with Inclusion
Limonitic Quartz Sandstone (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Zebra Jasper
Silicon Dioxide (SiO2) with iron oxide and manganese inclusions
metamorphic
Basalt (Water-worn Pebble)
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Carnelian
Carnelian Chalcedony (SiO2)
mineral
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Greenstone (possibly Basalt or Greenschist)
Greenschist (composed primarily of chlorite, actinolite, and epidote)
Metamorphic (low-grade)
Quartz (in a rock matrix)
Quartz (SiO2)
mineral
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Granite
Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
sedimentary
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
igneous
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Mineral
Pyrite
Iron Pyrite (FeS₂)
Mineral
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Quartz (likely milky/rose quartz variety)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Dendritic Agate
Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)
mineral
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Mineral (Gemstone variety of Beryl)
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Quartz (likely milky/gray variety)
Quartz (SiO₂)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral