Mineral, Part Of A Rock

Granite

Granite (Phaneritic Igneous Rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Granite (Felsic intrusive igneous rock)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Granite

Granite (Felsic Plutonic Rock)

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Vesicular Basalt (Amygdaloidal)

Amygdaloidal Basalt (Mafic volcanic rock)

Small gray rock fragment, likely granite or diorite

Uncertain; probable coarse-grained silicate rock dominated by feldspar and quartz, possibly biotite/hornblende

Granite

Granite (Phaneritic intrusive igneous rock)

Chert with Calcite Veining

Microcrystalline Quartz (SiO2) with Calcium Carbonate (CaCO3) veins

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Dark vesicular volcanic rock, likely basaltic scoria

Scoria (vesicular basalt; composition commonly plagioclase, pyroxene, and iron-rich glass)

Chondrite Meteorite

Ordinary Chondrite (L or H Type)

Fossilized Shark Tooth

Carcharocles sp. or Striatolamia sp. (Phosphate/Carbonate mineralized Hydroxyapatite)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Druzy Quartz on Quartz Base

Silicon Dioxide (SiO2)

Granite

Granite (Felsic Plutonic Rock)

Quartz-rich breccia or vein quartz with iron staining

Microcrystalline to crystalline SiO₂, likely quartz with iron oxides/hydroxides and altered host rock

Fossilized Bored Limestone

Limestone with Ichnofossils (Gastrochaenolites or Entobia)

Granite

Phaneritic plutonic rock (SiO2 range 70-75%)

Quartzite

Quartzite (SiO2)

Granite

Intrusive Felsic Igneous Rock

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Granite

Granite (Phaneritic igneous rock)

Granite Pebble

Granite (Felsic Intrusive Igneous Rock)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Chromite

Chromite (FeCr2O4)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Diorite (River Cobble)

Phaneritic Intermediate Igneous Rock

Granite Pebble (River Rock)

Phaneritic Felsic Igneous Rock

Gabbro

Plutonic mafic rock

Peridotite (Olivine)

Peridotite (comprising (Mg,Fe)2SiO4)

Granite

Granite (Felsic Plutonic Rock)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Weathered pink granite

Granite, chiefly quartz, potassium feldspar, plagioclase, and biotite

Granite

Granodiorite / Granite (Phaneritic Igneous Rock)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Black Tourmaline (Schorl)

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Peridotite (Dunite/Peridot Xenolith)

Peridotite (predominantly Olivine (Mg, Fe)2SiO4)

Basalt (River Pebble)

Basalt

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock