Tree Agate
Chalcedony (SiO2)
gemstone
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Technogenic) in the encyclopedia
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Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Orange Quartz with Epidote
Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate hydroxide (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Limonite (Yellow Ochre)
Hydrated Iron Oxide (FeO(OH)·nH2O)
mineral
Copper Ore with Chrysocolla/Malachite
Hydrated copper phyllosilicate (Chrysocolla) / Copper carbonate hydroxide (Malachite)
mineral
Fossilized Bone Chunk (likely Dinosaur or Large Mammal)
Permineralized Fossil Bone
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Ruby
Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)
mineral
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Mammoth or Mastodon Tooth Fossil
Proboscidea tooth (Mammuthus or Mammut)
fossil
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Plume Agate or Moss Agate
Agate (SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Gneiss
Gneiss
metamorphic
Fossilized Shark Tooth (Root Portion)
Selachimorpha (partial specimen)
fossil
Greenstone
Metabasalt / Greenschist
metamorphic
Garden Quartz (Lodalite)
Silicon Dioxide (SiO2) with mineral inclusions
mineral
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Fossilized Bone Chunk
Permineralized Vertebrate Bone (indeterminant)
fossil
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Quartz Pebble with Hematite Inclusion
Silicon Dioxide (SiO2)
mineral
Porphyritic Igneous Rock with Iron Oxide Weathering
Weathered Porphyry (containing Quartz, Feldspar, Amphibole/Biotite, and Hematite/Limonite)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Obsidian
Obsidian (Volcanic Glass, ~70% SiO2)
igneous
Pegmatite
Granitic Pegmatite
igneous
Greenschist
Chlorite schist
metamorphic
Greenschist
Chlorite schist
metamorphic
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
sedimentary
Fossilized Bone
Permineralized Bone (Vertebrate Fossil)
fossil
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Hematite
Iron Oxide (Fe2O3)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
mineral
Granite
Granite
igneous
Pink Granite
Phaneritic plutonic rock (dominated by Alkali Feldspar)
igneous