Anthropogenic Specimen (Man Made)

Chalcedony (Yellow Agate)

Cryptocrystalline Quartz (SiO2)

Vanadinite on Matrix

Vanadinite (Pb5(VO4)3Cl)

Stichtite in Serpentine (Atlantasite)

Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4

Yellow Jasper

Jasper (Silica-rich Microcrystalline Quartz, SiO2 with Iron impurities)

Dendritic Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Tektite (Indochinite)

Tektite (Amorphous Meteoritic Glass)

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)

Graphic Granite

Pegmatitic Granite (Quartz and Microcline KAlSi3O8)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Pyrite Geode

Iron Disulfide (FeS2)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Quartz on Matrix

Silicon Dioxide (SiO2)

Sandstone with Concretions / Liesegang Rings

Arenite with iron oxide banding

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Red Jasper (Amygdaloidal Basalt with Agate)

Silicon dioxide (SiO2) in Basalt host

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Aquamarine with Ruby Accent

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)

Fluorite

Calcium Fluoride (CaF2)

Quartz Geode (Cracked Open)

Quartz (Silicon Dioxide - SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Slate

Foliated metamorphic rock

Orange Calcite with Siderite/Iron Oxide Coating

Calcium Carbonate (CaCO3)

Cloudy Quartz

Silicon Dioxide (SiO2)

Moonstone (Blue Flash)

Potassium Aluminum Silicate (KAlSi3O8), a variety of Orthoclase Feldspar

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Chert (specifically Jasper/Carnelian Agate)

Microcrystalline Quartz (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Chert (Common Opal/Chalcedony mixture)

Silicon Dioxide (SiO2)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Chalcedony (Agatized Coral / Rough Chalcedony Node)

Silicon Dioxide (SiO2)

Chert (Jasper influence)

Microcrystalline Quartz (SiO2)

Granite

Granite (Felsic Plutonic Rock)

Fluorite (Green)

Calcium Fluoride (CaF2)

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Labradorite

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