Metamorphic Rock (Composed Of Multiple Minerals)

Basalt with Epidote/Chlorite

Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Arsenopyrite

Arsenopyrite (FeAsS)

Peacock Ore (Bornite/Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)

Specular Hematite

Hematite (Fe2O3)

Blue Quartz (potentially Dumortierite-included)

Silicon Dioxide (SiO2) with inclusions

River Cobble (Gneiss/Schist mix)

Foliated Metamorphic Rock (Gneissic/Schistose)

Quartz Geode

Silicon Dioxide (SiO2) in a sedimentary or volcanic host

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

Oolitic Limestone (Egg Stone)

Oolite (Chemical sedimentary rock, primarily CaCO3)

Granite

Phaneritic plutonic rock (SiO2 range 70-75%)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Unakite (Epidotized Granite)

Epidotized Granite (composed of Epidote, Orthoclase, and Quartz)

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (composed predominantly of sand-sized grains, 0.0625 to 2 mm)

Green Schist

Greenschist

Granite

Phaneritic plutonic rock (composed primarily of Quartz, Feldspar, and Mica)

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Muscovite Mica

Muscovite [KAl2(AlSi3O10)(OH)2]

Limonite Concretion

Goethite-rich Concretion (FeO(OH))

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Agate

Agatized Chalcedony (SiO2)

Rough Sapphire (Corundum)

Corundum (Al2O3)

Banded Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Blue Sapphire

Corundum (Al2O3)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Epidote and Quartz in Basalt Porpohyry

Epidote bearing Porphyritic Basalt with Quartz Veins

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Basalt

Extrusive Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Boxwork Quartz / Septarian Jasper

Boxwork (SiO2 with iron oxide inclusions)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Green Aventurine (likely)

Silicon dioxide (SiO2) with fuchsitemica inclusions

Yellow Aventurine (Yellow Quartzite)

Silicon Dioxide (SiO2) with inclusions

Rhodonite

Rhodonite (Mn2+SiO3)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)