Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)
Diorite (Igneous rock, intrusive, intermediate composition)
Igneous Rock
Category
Mineral, Variety Of Quartz
Browse mineral, variety of quartz specimens identified by the Rock Identifier community.
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
Sedimentary Rock
Granite
Phaneritic high-silica plutonic rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color
Silicon Dioxide (SiO2), a variety of Chalcedony
Sedimentary Rock
Jasper
Silicon Dioxide (SiO2) with iron and magnesium inclusions
sedimentary
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (Sedimentary Clastic Rock)
sedimentary
Leopard Skin Jasper
Jasper (Silicon Dioxide with impurities), SiO2
sedimentary
Chert (vuggy variety)
Microcrystalline silica (SiO2)
sedimentary
Chalcedony
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Yellow Jasper
Chalcedony (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Satin Spar (often marketed as Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper
Chalcedony (cryptocrystalline quartz), SiO2
Sedimentary
Rough Quartz (likely Rose or Amethyst variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
metamorphic
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Agate (Bead Form)
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Orange Aventurine (Sunstone-style Quartzite)
Silicon Dioxide (SiO2) with Goethite or Hematite inclusions
metamorphic
Chert (with Lichen)
Microcrystalline Quartz (SiO2)
sedimentary
Granite Pebble (Salt and Pepper Granite)
Felsic Intrusive Igneous Rock (Granite)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Green Aventurine
Silicon Dioxide (Quartz variety) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO2)
metamorphic
Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Quartzite with inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Jasper
Silicon Dioxide (SiO2)
sedimentary
Carnelian (a variety of Chalcedony)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Mineral
Chert (Smooth River Pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
mineral
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Agatized Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Geode (Quartz chalcedony variety)
SiO2 (Silicon Dioxide)
sedimentary
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
sedimentary