This Appears To Be A Man Made Metallic Object, Likely Jewelry, Not A Natural Rock, Mineral, Or Geological Specimen.

Clear Quartz

Silicon Dioxide (SiO2)

Blue Dyed Agate Geode

Chalcedony (cryptocrystalline Quartz), SiO2

Sunstone

Heliolite (Sodium Calcium Aluminum Silicate with Iron or Copper inclusions)

Sunstone

Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Ironstone Concretion (Moqui Marble Type)

Goethite/Hematite-cemented Sandstone Concretion

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Star Ruby

Corundum (Al2O3 with chromium and rutile inclusions)

Amber (Dark/Black Variety)

Succinite (Resinite), C10H16O

Chert

Chert (microcrystalline quartz, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Granite

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

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Blue Quartz

Quartz (SiO2) with inclusions

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite (on Quartz matrix)

Iron Sulfide (FeS2)

Pyrite (on Quartz/Sulfide matrix)

Iron Sulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Mystic Topaz

Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)

Diamond (Macled/Crystal fragment)

Carbon (C), isometric crystal system

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Citrine (likely Heat-Treated)

Quartz (Silicon Dioxide, SiO2)

Diamond (appearing in jewelry)

Diamond (pure Carbon, C)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Rutilated Quartz (beads)

SiO2 with TiO2 inclusions (Titanium Dioxide inclusions within Quartz)

Sandstone (likely Quartzose)

Arenite (primarily SiO2)

Gold Nugget

Native Gold (Au)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide - SiO2)

Onyx

Onyx (a variety of Chalcedony, SiO₂)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Green Fluorite (Beaded)

Fluorite (Calcium Fluoride, CaF2)

Blue Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)

Quartz (Crystal/Druzy Quartz)

Quartz (SiO₂)

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Citrine Geode (or Druzy Citrine)

Silicon Dioxide (SiO₂) - a variety of Quartz

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Slickenside

Tectonic Fault Scarp Surface