Mineral, Part Of A Rock

Quartzite River Rock

Quartzite (SiO2)

Small pale mineral fragment, likely quartz or calcite

Quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartzite (Beach Pebble)

Quartzite (primarily SiO2)

Hypersthene

Enstatite (Hypersthene variety), (Mg,Fe)SiO3

Peridotite (with Olivine)

Peridotite (rich in Olivine, (Mg,Fe)2SiO4)

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Granite (Phaneritic intrusive igneous rock)

Garnet (likely Almandine or Pyrope)

Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3

Granite

Phaneritic plutonic rock (Felsic)

White pebble, likely quartz or calcite

Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Granite

Granite (phaneritic felsic intrusive rock)

Rounded gray granitoid pebble

Granite or granodiorite; chiefly quartz, feldspar, and mica/hornblende

Greenstone

Metabasalt (composed of chlorite, epidote, and actinolite)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Vesicular Basalt (Amygdaloidal)

Amygdaloidal Basalt (Mafic volcanic rock)

Pink Quartz / Rose Quartz

Silicon Dioxide (SiO2)

Basalt (Crushed Roadstone)

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

Malachite-stained copper-bearing rock

Malachite, Cu₂CO₃(OH)₂, likely coating or alteration of copper sulfide/host rock

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Tumbled brecciated jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with pale quartz/chalcedony veins

Tumbled metamorphic pebble, likely gneiss

Foliated gneiss; commonly quartz, feldspar, mica, and amphibole

Ferruginous Sandstone (with Iron Oxide staining)

Clastic Sedimentary Rock - Quartz Arenite/Wacke

Granite

Granite (Plutonic Igneous Rock)

Granite

Phaneritic Plutonic Igneous Rock

Yellow Quartzite (River Pebble)

Quartzite (primarily Silicon Dioxide, SiO2)

Granite Pebble

Felsic intrusive igneous rock

Quartz (specifically Milky/Gray Quartz)

Silicon Dioxide (SiO2)

Fossilized Bone Fragment

Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)

Weathered basaltic rock

Basalt, likely vesicular or altered basalt

Belemnoit (Fossil)

Belemnoidea (Order), Rostrum / Guard

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Igneous Rock)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Granite or granitic pebble

Granitic rock, primarily quartz, feldspar, and mica

Granite Pebble

Granite (Felsic intrusive igneous rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Rugose Coral (Horn Coral)

Order Rugosa (extinct fossilized coral)