Igneous And Sedimentary Mixture

Quartz / Limestone Gravel

SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)

Mixed Crushed Stone

Aggregate (varied mineral composition)

Dalmation Stone (Dalmation Jasper)

Peralkaline Rock with Feldspar and Arfvedsonite

Dalmatian Jasper

Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Chalcedony (Agate/Quartz variety)

Cryptocrystalline Quartz (SiO2)

Dalmation Stone

Peralkaline Rock (Microcline Quartz mixture with Arfvedsonite)

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone

Undetermined; likely iron oxides/hydroxides (goethite–hematite–limonite) in a silicate host

Quartz Pebble

Silicon Dioxide (SiO2)

Dragon Blood Jasper

Epidote with Red Piedmontite (silicate)

Fine-grained brown-gray rock, possibly andesite

Likely andesite or another fine-grained volcanic rock; exact identification is uncertain from the photo

Decorative polished pebbles

Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Quartz Pebble

Silicon Dioxide (SiO2)

Pegmatite / Granite with Mica

Pegmatite (Igneous Rock composed of Quartz, Feldspar, and Muscovite Mica)

Granite

Phaneritic Igneous Rock (Granite)

Granite (likely)

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Bumblebee Jasper

Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)

Iron-stained quartz-rich rock (possibly ironstone or ochre-coated quartz)

Undetermined ferruginous rock; yellow-brown coloration likely from goethite and/or limonite (hydrated iron oxides)

Conglomerate (Asphaltic/Anthropogenic)

Clastic sedimentary rock / Bituminous mixture

Bumblebee Jasper

Calcite with Arsenic and Manganese oxides (technically a volcanic rock)

Nuummite

Nuummite (mixture of anthophyllite and gedrite)

Granite Pebble (Pink/Orthoclase Granite)

Granite

Migmatite

Migmatite (Mixed Rock)

Limonite (Ironstone Concretion)

Hydrous ferric oxides (FeO(OH)·nH2O)

Granite Gravel (Pebble)

Intrusive Felsic Igneous Rock

Granite pebble

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Copper Ore (Malachite and Limonite bearing)

Cuprite, Malachite, and Limonite mixture

River Pebble (Gneiss or Quartzite mixture)

Metamorphic rock (Commonly Gneissic)

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Multi-Gemstone Quartz Bracelet (Amethyst, Aventurine, Rose Quartz, Clear Quartz)

Silicon Dioxide (SiO2) mixture

Limonite

FeO(OH)·nH2O

Mixed gravel and small stones

Unsorted gravel; individual clasts are not identifiable from the image

Ironstone concretion (possible limonite/goethite-rich piece)

Iron-oxide-rich ironstone; commonly composed of goethite (FeO(OH)) and/or limonite

Ironstone concretion (possibly limonite/goethite-bearing)

Limonite, a mixture of hydrated iron oxides, commonly including goethite (α-FeO(OH))

Limonite-stained Chert/Jasper

Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)

Limonite

FeO(OH)·nH2O

Raw Corundum (Sapphire/Ruby variant)

Aluminum oxide (Al2O3)

Limonite and Goethite Iron Ore

Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)

Limonite Sandstone

Ferruginous Sandstone (Hydrated Iron Oxide)