Mineral Like Byproduct (Technogenic)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

River Cobble (likely Basalt or Greenstone)

Mafic Igneous Rock (with possible chloritic alteration)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3)

Bauxite

Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)

Quartz (Milky to Clear)

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Sandstone (Water-worn pebble)

Arenite (primarily SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Fossil Shark Tooth

Chondrichthyes (Class)

Fossilized Rugose Coral (Horn Coral)

Order Rugosa

Green Quartzite (or Green Jasper)

Silica (Silicon Dioxide, SiO2) with inclusions

Vesicular Basalt with Epidote

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

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Sandstone

Arenite (SiO2 with various cementing minerals)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Basalt-Amugydule (Amygdaloidal Basalt)

Aphanitic Mafic Igneous Rock with Vesicle Infillings

Howlite

Howlite (Ca2B5SiO9(OH)5)

Milky Quartz

Silicon Dioxide (SiO2)

Botryoidal Hematite

Hematite (Iron(III) oxide, Fe2O3)

Rose Quartz

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

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2)

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Dyed Agate

Chalcedony (SiO2)

Amethyst

Silicon Dioxide (SiO2)

Milky Quartz Beads

SiO2 (Silicon Dioxide)

Quartz

SiO2 (Silicon Dioxide)

Clear Quartz

Silicon Dioxide (SiO2)

Howlite and Tree Agate

Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Agate/Quartz)

Aventurine and Amazonite

Silicon Dioxide (SiO2) with inclusions and Microcline (KAlSi3O8)

Aquamarine

Beryl (Be3Al2Si6O18)

Agate

Agate (Chalcedony), SiO2

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Blue Lace Agate (Geode/Druzy variant)

Chalcedony (SiO2) with Quartz druzy

Vesicular Basalt (Lava Rock)

Vesicular Basalt

Agate

Silicon Dioxide (Chalcedony), SiO2

Milky Quartz (Ferruginous)

Silicon Dioxide (SiO2)

Labradorite

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation