Mineraloid (Human Made Geological Specimen)

Aragonite

Aragonite (Carbonate mineral), CaCO3

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (specifically Milky or Rose Quartz)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Fancy Jasper (Agate/Chert mix)

Silicon Dioxide (SiO2) with impurities

Amygdaloidal Basalt

Basalt with secondary amygdule minerals (likely Epidote or Chlorite)

Banded Agate

Cryptocrystalline Quartz (SiO2)

Snowflake Obsidian

Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)

Orange Calcite

Calcium Carbonate (CaCO3)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz / Greenish Quartz)

SiO2 (Silicon Dioxide)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with FeOx inclusions

Dalmatian Jasper

Peralkaline rhyolite

Heat-Treated Citrine (Amethyst-based)

Quartz (Silicon Dioxide) - SiO2

River Cobble (likely Quartzite or Limestone)

SiO2 (Quartzite dominant) or CaCO3 (Limestone dominant)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Quartzite with Quartz Vein

Metamorphosed sandstone (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Jasper with Epidote Vein

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))

Chert (Smooth River Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Dearest Jewelry (Multigemstone)

Combination of Diamond (C), Emerald (Be3Al2Si6O18), Amethyst/Rock Crystal (SiO2), Ruby (Al2O3), Emerald (Be3Al2Si6O18), Sapphire (Al2O3), and Topaz (Al2SiO4(F,OH)2)

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(F,OH)2

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Ferruginous Sandstone (Gritstone)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))

Flower Agate

Chalcedony (cryptocrystalline Quartz) with Spherulite inclusions; SiO2

Kyanite (Blue and Green varieties)

Kyanite (Al₂SiO₅)

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Fossiliferous Limestone with Brachiopod shell

Calcium carbonate (CaCO3)

Sandstone Concretion

Sedimentary Concretion (SiO2 or CaCO3 cemented)