Sandstone (likely Fossiliferous)
Arenite / Sedimentum arenaceum
sedimentary
Category
Not A Geological Specimen
Browse not a geological specimen specimens identified by the Rock Identifier community.
Learn about Not A Geological Specimen in the encyclopedia
View all →
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Alexandrite
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Tiger's Eye (Oeil de Tigre)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartzite Beach Pebble
Quartzite (primarily SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Septarian Nodule
Septarian Concretion (CaCO3 + Hydrated SiO2)
sedimentary
Sunstone
Oligoclase (Feldspar variety)
mineral
Pink Quartz Grains
Silicon Dioxide (SiO2)
mineral
Stony Meteorite (Chondrite)
Ordinary Chondrite (L or H type)
meteorite
Ruby in Zoisite
Anyolite (Zoisite with Corundum)
metamorphic
Amazonite
Microcline (variety Amazonite), K(AlSi3O8)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Fire Quartz (Hematoid Quartz)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Moonstone (Green Moonstone / Garnierite)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Garnierite
mineral
Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Chalcedony (Botryoidal or Chalcedony Rose)
Silicon dioxide (SiO2)
mineral
Carnelian (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Bloodstone
Heliotrope (Chalcedony)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Desert Rose
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Dendritic Quartz
Silicon Dioxide with inclusions (SiO2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
mineral
Petrified Wood (Silicified Wood)
Silicified fossil wood (SiO2)
metamorphic
Smoky Quartz with Amethyst
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Petoskey Stone
Hexagonaria percarinata
sedimentary
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Ruby Zoisite
Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)
metamorphic
Common Opal
Hydrated Silica (SiO2·nH2O)
mineral
Ocean Jasper
Silicon Dioxide (SiO2) with iron and other mineral inclusions
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral