Basalt (River Stone)
Basalt
Category
Browse mineralogical specimen specimens identified by the Rock Identifier community.
Basalt (River Stone)
Basalt
Fluorite Tower
Fluorite (Calcium Fluoride - CaF2)
Quartz (Milky/Vein Quartz)
Silicon Dioxide (SiO2)
Diamond
Native Carbon (C)
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Basalt
Basalt (Mafic volcanic rock)
Limestone
Calcium Carbonate (CaCO3)
Basalt (River Stone)
Basalt
Quartz (Quartzite)
Silicon Dioxide (SiO2)
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
Jasper (likely Brecciated or Multi-colored)
Jasper (SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Blue Lace Agate
Silicon Dioxide (SiO2) with Chalcedony structure
Banded Jasper
Silicon Dioxide (SiO2) with impurities
Jasper with Quartz Veins
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Stromatolite
Biogenic Sedimentary Rock (Precambrian Stromatolite fossil)
Petrified Wood
Silicified Wood (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Yellow Quartz (Yellow Aventurine)
Silicon Dioxide (SiO2) with inclusions
Malachite
Malachite (Cu2CO3(OH)2)
Tree Agate
Chalcedony with Dendritic Chlorite (SiO2 with impurities)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Petrified Wood
Silicified Wood (SiO2)
Fossil Coral (Petoskey Stone or similar)
Hexagonaria percarinata (Fossilized Rugose Coral)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Red Jasper (possibly with Quartz or Hematite)
Silicon Dioxide (SiO2) with iron oxide impurities
Rose Quartz
Silicon Dioxide (SiO2) with trace rutile/dumortierite
Agate (Chalcedony)
Silicon Dioxide (SiO2)
Jasper (likely Iron-stained)
Silicon Dioxide (SiO2) with iron oxide inclusions
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt with Feldspar phenocrysts
Amethyst in Matrix
Silicon Dioxide with Iron Impurities (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Sandstone (Wonderstone)
Arenite with Liesegang rings
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 with Au)
Citrine Quartz
Silicon Dioxide (SiO2)