Amygdaloidal Basalt with Secondary Minerals
Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)
igneous
Category
Mineral, Often A Rock Given Its Aggregate Nature
Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.
Jasper-Agate Conglomerate (Potentially Puddingstone)
Jasper-cemented Silicate Aggregate (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
mineral
Basalt
Basalt
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Basalt (Polished)
Basalt (Mafic Extrusive Igneous Rock)
Igneous
Red Jasper (possibly Chert/Argillite)
Jasper (SiO2) with iron oxide inclusions
sedimentary
Basalt
Basalt (Mafic Extrusive)
igneous
Milky Quartz Pebble (Tumbled Quartzite)
Silicon Dioxide (SiO2)
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Basalt
Mafic volcanic rock (Silicon dioxide 45-52%)
igneous
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Polychrome Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Serpentinite
Serpentinite (a rock composed predominantly of serpentine group minerals)
metamorphic
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Sandstone Concretion
Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Pumice
Pumice (Vesicular volcanic glass)
igneous
Quartz-veined Mudstone or Argillite
SiO2 (Quartz) in Siltstone/Mudstone matrix
sedimentary
Basalt Pebble
Basalt
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chert (specifically Pink/Tan Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Fluorite (often referred to as Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
igneous
Scoria (Lava Rock)
Scoria (Basaltic Scoria)
Igneous
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Silver (S925)
Native Silver (Ag)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Garnet
Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)
mineral
Granite (Weathered/Oxidized)
Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)
igneous
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Chert (Nodular)
Microcrystalline Silica (SiO2)
sedimentary
Tiger's Eye
Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)
Mineral