Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
Category
Browse igneous and sedimentary mixture specimens identified by the Rock Identifier community.
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
Granite Sand (Decomposed Granite)
Grus / Quartz-Feldspar Detritus
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Limonite-stained Chert/Jasper
Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Bumblebee Jasper
Calcite with Arsenic and Manganese oxides (technically a volcanic rock)
Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
Limonite (Ironstone Concretion)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Raw Corundum (Sapphire/Ruby variant)
Aluminum oxide (Al2O3)
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
Bauxite (Concretionary)
Bauxite (Al(OH)3, AlO(OH))
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Limonitic Iron Ore / Goethite
Hydrated Iron(III) oxide-hydroxide (primarily FeO(OH)·nH2O)
Bumblebee Jasper
Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)
Limonite/Goethite (Iron Ore)
Hydrous ferric oxides (FeO(OH)·nH2O)
Rainbow Moonstone with Black Tourmaline
White Labradorite with Schorl (Na,Ca)(Al,Si)4O8
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Diorite (Polished Cobble)
Diorite (Intermediate intrusive igneous rock)
Limonite (Ironstone Concretion)
Limonite (Hydrous ferric oxide mixture, FeO(OH)·nH2O)
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Limonite
Limonite (FeOO·nH2O)
Bauxite (Aluminum Ore)
Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
Limonite (Iron Ore)
Goethite and related iron hydroxides (FeO(OH)·nH2O)
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
Limonite (Iron Stone/Ocher)
Limonite (FeO(OH)·nH2O)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Bauxite
Bauxite (Al2O3·nH2O)
Limonite (Iron Ore)
Limonite (̑FeO(OH)·nH₂O)
Limonite Concretion (Ironstone)
Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)
Oolitic Ironstone
Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)
Diorite
Diorite (Intermediate intrusive igneous rock)
Nuummite
Nuummite (mixture of Anthophyllite and Gedrite)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Tiger Iron / Banded Iron Formation
Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)