Tiger's Eye
Pseudomorph of Chalcedony (SiO2) after Crocidolite
metamorphic
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli
Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)
metamorphic
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Tiger's Eye
SiO2 (Silicon Dioxide with iron inclusions)
Mineral
Green Aventurine (Tumbled Quartz)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)3Si3O10(OH)2)
metamorphic
Obsidian
Volcanic Glass (Silicon Dioxide with impurities)
igneous
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
mineral
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony with Matrix
Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Puddingstone (Jasper Conglomerate)
Jasper Conglomerate (SiO2 matrix with Fe2O3 inclusions)
sedimentary
Yellow Beryl (Heliodor)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Crazy Lace Agate
Silicon Dioxide (Microcrystalline Quartz) - SiO2
mineral
Rose Quartz
Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Crazy Lace Agate
Banded Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Puddingstone (Gowganda Tillite/Jasper Conglomerate)
Jasper Conglomerate (SiO2 primary composition)
sedimentary
Carnelian
Carnelian (a variety of Chalcedony) - SiO2
mineral
Ironstone Concretion (Boji Stone/Moqui Marble type)
Goethite/Hematite-encrusted Sandstone Concretion
sedimentary
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium or Manganese
mineral
Chert (Iron-stained or Jasperoid)
Microcrystalline Quartz (SiO2)
sedimentary
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Kunzite (variety of Spodumene)
Lithium Aluminum Silicate (LiAlSi2O6)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide based crypto-crystalline Quartz with Iron inclusions)
sedimentary
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Fossiliferous Chert (Gryphaea Fossil)
Silicon Dioxide (SiO2) with Calcitic Mollusk Remnants
sedimentary
Labradorite
(Ca, Na)(Al, Si)4O8
mineral