Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Serpentinite

Serpentinite (complex silicate minerals including Lizardite, Antigorite, and Chrysotile)

Sandstone (Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Basalt (with possible iron oxide staining)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Ruby

Corundum (Aluminum Oxide with Chromium traces), Al2O3:Cr

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Conglomerate

Clastic sedimentary rock (Conglomerate)

Quartz Pebble

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Dzi Bead (Agate)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Red Jasper (Brecciated Jasper)

SiO2 (Silicon Dioxide) with Ferric Iron inclusions

Amygdaloidal Basalt

Amygdaloidal Basalt (Host rock) with Quartz or Calcite amygdules

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)

Greenschist

Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)

Jasper

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Lepidolite

K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)

Banded Gneiss

Gneiss (pronounced 'nice')

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Sapphire

Corundum (Al2O3)

Sandstone

Arenite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Petrified Wood

Silicified Wood (SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Iron-stained Quartzite

Quartzite with Limonite/Hematite staining (SiO2 with FeO(OH)·nH2O)

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Astrophyllite

Potassium Sodium Iron Manganese Titanium Silicate Hydroxide (K3NaFe7Ti2Si8O24(OH)7)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Sodalite in Matrix (Sunset Sodalite)

Sodalite Na8(Al6Si6O24)Cl2

Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)

Quartz (SiO₂)

Bi-Color Tourmaline (or Watermelon Tourmaline)

Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)

Granite (with Muscovite Mica)

Phaneritic Felsic Igneous Rock (primarily Quartz SiO2, K-Feldspar KAlSi3O8, and Muscovite KAl2(AlSi3O10)(OH)2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Shale creek bed

Shale (fine-grained clastic sedimentary rock)

Sandstone (Ferruginous)

Sandstone (mainly SiO2 with Fe2O3 staining)

Granite (Dioritic variant)

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (specifically Pink or Red Granite)

Phaneritic Felsic Igneous Rock (Granite)

Granite

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

Conglomerate

Conglomerate (clastic sedimentary rock)

Pyrite Geode (Sparkling Druzy)

Iron Sulfide (FeS2) in Sedimentary Nodule

Chalcedony (Smoky Quartz or Agate nodule fragment)

Silicon Dioxide (SiO2)