Vesicular basalt (likely amygdaloidal basalt)
Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, clinopyroxene, and commonly olivine; vesicles are partly mineral-filled amygdules.
igneous
Category
Mineral On Sedimentary
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
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Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
mineral
Quartz-veined Sandstone Pebble
Quartzite-veined Arenite
sedimentary
Amethyst Geode
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral
Tumbled Agate
Silicon Dioxide (SiO2)
gemstone
Breccia
Sedimentary Breccia
sedimentary
Gossanous Sandstone (likely Terrestrial)
Arenite with Iron-Oxide inclusions
sedimentary
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
sedimentary
Howlite
Ca2B5SiO9(OH)5
mineral
Sandstone (likely Arkosic or Lithic Sandstone)
Clastic Sedimentary Rock (SiO2 with assorted minerals)
sedimentary
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Weathered / Crushed)
Quartz Sandstone
sedimentary
Fossil Snail
Gastropoda (fossilized)
fossil
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Sandstone (with Iron Staining)
Arenite
sedimentary
Worn River Pebble with Fossil Indentation
Sedimentary Rock with Fossil Infill
sedimentary
Banded Sandstone (River Pebble)
Arenite (SiO2 primarily)
sedimentary
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Shale
Fissile Mudstone
sedimentary
Tumbled brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Shale with Trace Fossils
Fissile mudrock (Shale)
sedimentary
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Limonite / Ironstone Nodule
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
River Rock (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock
sedimentary
Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
sedimentary
Alabaster
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Iron Oxide cement)
sedimentary
Sandstone (Quartzite texture)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with banding)
Arenite (primarily SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Bivalve Fossil (Shell-bearing Sedimentary Rock)
Class Bivalvia (Phylum Mollusca) within a Calcarenite/Sandstone matrix
fossil
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Citrine
SiO2 (Silicon Dioxide)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary