Chert (Jasper/Flint var.)
Silicon Dioxide (SiO2)
sedimentary
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Fossil Shark Tooth
Carcharocles or Lamniformes (order)
fossil
Chert (Jasper variation)
Chert (Cryptocrystalline microcrystalline Silicon Dioxide, SiO2)
sedimentary
Chert (with Limestone and Iron Oxide staining)
Cryptocrystalline Quartz (SiO2)
sedimentary
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
sedimentary
Almandine Garnet
Almandite (Fe3Al2(SiO4)3)
Mineral
Chert (Polished River Pebble)
Chert (SiO2)
sedimentary
Green Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Quartzite
Quartzite (Metamorphosed Quartz Arenite)
metamorphic
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Garnet
Silicate mineral group (often Pyrope or Almandine in this color range)
gemstone
Chromite
Chromite (FeCr2O4)
mineral
Tourmaline
Schorl (Complex boron silicate, NaFe3Al6(Si6O18)(BO3)3(OH)4)
mineral
Garnet (Pyrope-Almandine series)
Garnet Group, (Mg,Fe)3Al2Si3O12
mineral
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Green Quartzite
Quartzite (SiO2 with inclusions)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Strawberry Quartz (Quartz with Hematite inclusions)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Quartzite
Silica (SiO2) quartzite
metamorphic
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Grey Chalcedony
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Garnet-bearing granite or pegmatitic granitic rock
Coarse-grained granitoid, likely granite or pegmatite, composed mainly of quartz and feldspar with almandine/spessartine garnet and dark biotite or amphibole
igneous
Biotite Schist
Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Green Quartz (Aventurine or Prase)
Silicon Dioxide (SiO2) with inclusions
mineral
![Pyromorphite on Epidote (Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]) — mineral](https://media.rockidentification.com/3cbdc467-e5c5-447f-afde-c958e111a578-thumbnail.jpg)
Pyromorphite on Epidote
Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]
mineral
Blue Apatite
Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite with Chlorite/Epidote
Metamorphosed Quartzite (SiO2)
metamorphic
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral