Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
Granite (Weathered)
Phaneritic Felsic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Basalt with Secondary Mineral Inclusions
Amygdaloidal Basalt (Mafic volcanic rock, primarily Augite and Plagioclase)
igneous
Granite (Weathered)
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)
igneous
Limonite Pseudomorph after Pyrite
Goethite/Limonite FeO(OH)·nH2O replacing Pyrite FeS2
mineral
Basalt with Epidote (Flowerstone-like texture)
Amygdaloidal Basalt (silicate mineral inclusions)
igneous
Granite Cobble
Granitoid (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Mica minerals)
igneous
Quartz (with Iron staining)
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Black Sardonyx/Onyx variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Jasper and Quartzite Pebble
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary/metamorphic
Banded Agate Geode
Silicon Dioxide (SiO2)
mineral
Geode with Iron-Stained Quartz/Calcite
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix
sedimentary
Quartzite with vugs/druzy quartz
Crystalline Silicon Dioxide (SiO2)
metamorphic
Milky Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (composition of plagioclase feldspar, pyroxene, and olivine)
igneous
Limestone (Concretionary or Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Diorite (weathered)
Intermediate plutonic igneous rock
igneous
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion
Sedimentary concretion
Sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO ₂)
Mineral (specifically a variety of Chalcedony, which is a cryptocrystalline quartz)
Agate
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Quartz (River Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Limonite after Pyrite (Pseudomorph)
FeO(OH)·nH2O following FeS2
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt
igneous
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Basalt
Mafic Volcanic Rock (composed of plagioclase, pyroxene, and olivine)
igneous
Vesicular Basalt (or Porphyritic Scoria)
Vesicular Basalt
igneous
Banded Chert with Quartz Veining
Microcrystalline Quartz (SiO2)
sedimentary
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Jasper (likely river-tumbled)
Jasper (Silica/Silicon Dioxide, SiO2)
sedimentary (microcrystalline silicate)
Azurite Malachite (Mixed)
Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
mineral
Cavansite
Cavansite (Ca(VO)Si4O10·4H2O)
mineral
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Pumice
Pumice (a highly vesicular volcanic rock)
igneous
Yellow Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Quartz (Milky/Crystalline)
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble (Tumbled Quartzite)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral