Anthropogenic Specimen (Man Made)

Calamites Fossil (Horsetail Stem)

Calamites (Genus), part of the class Equisetopsida

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Biotite (Black Mica)

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

Quartz Pebble (Water-worn)

Silicon Dioxide (SiO2)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Fossiliferous Limestone

Fossiliferous Limestone (CaCO3)

Granite (Pink/Red Orthoclase variety)

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Jasper with Chalcedony

Silicon Dioxide (SiO2)

Yellow Quartzite (River Pebble)

Quartzite (SiO2)

Chalcedony with Druzy Quartz Geode

Silicon Dioxide (SiO2)

Granite

Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)

Labradorite

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

Undetermined Due to Blur (Possible Flesh-Tone Mineral)

Unknown (Insufficient Visual Clarity)

Sunstone

Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)

Jasper with Agate and Quartz Inclusions

Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate

Mica (Biotite and Muscovite) in Matrix

Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH)

Jasper

Jasper (Silicon Dioxide, SiO2)

Diamond (Cut Specimen)

Carbon (C)

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz Geode

Quartz (Silicon Dioxide, SiO2) Geode

Basalt (Vesicular/Amygdaloidal or Water-Worn)

Basalt

Greenschist

Greenschist (Chlorite-actinolite schist)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

Sunstone

Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions

Yellow Calcite

Calcium Carbonate (CaCO3)

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Emerald In Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Diamond in Gold Setting

Diamond (C - pure carbon)

Diamond

Diamond (C)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Smoky Quartz

Smoky Quartz (SiO2)

Quartz Geode

Silicon dioxide (SiO2)

Garnet Beads

Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)

Porphyritic Basalt (with Amygdales)

Amygdaloidal Porphyritic Basalt

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz on Host Rock

Silicon Dioxide (SiO2)