Jasper (brecciated or orbicular variety)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary/mineral
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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Blue Quartzite (Blue Aventurine)
SiO2 (Silicon Dioxide with Dumortierite/Crocidolite inclusions)
metamorphic
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Siderite and Calcite)
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Chert (Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (specifically Agate or Carnelian pebble)
Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Chert (often called Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite with Dark Mineral Inclusions
Quartzite (primarily SiO2) with accessory minerals
metamorphic
Ferruginous Quartz (Carnelian/Sardine Jasper)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary/mineral
Dendritic Agate
Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)
Mineral
Quartzite (with Iron Staining)
Metamorphosed Sandstone (mainly SiO2 with Fe2O3/FeOOH impurities)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Aventurine
Silicon dioxide (SiO2) with Fuchsite inclusions
metamorphic
Ferruginous Quartz (Iron-stained Quartzite)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Tumbled blue-green fluorite (probable)
Fluorite, calcium fluoride (CaF₂)
mineral
Yellow Quartz River Pebble
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Blue Schist / Lydian Stone / Chert with Glaucophane
Metamorphic rock containing quartz and glaucophane
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcedony Geode Fragment
Cryptocrystalline Quartz (SiO2)
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2) with traces of Titanium, Manganese, or Iron
mineral
Agate (Carnelian Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist (Metamorphosed Mafic Rock)
metamorphic
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary