Mineraloid Like Synthetic Material

Chert (Green Jasperiod)

Chert (Microcrystalline Quartz, SiO2)

Fossilized Megalodon Tooth Fragment

Otodus megalodon (Carcharocles megalodon fossil)

Chert (Nodule)

Chert (Alpha-Quartz, SiO2)

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Jasper Breccia

Brecciated Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Sandstone (Ferruginous)

Arenite with Iron oxide staining (SiO2 with Fe2O3)

Pink Granite

Phaneritic plutonic rock (dominated by Alkali Feldspar)

Pumice

Pumice (volcanic glass with vesicular texture)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Granite / Gneiss Complex

Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)

Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (SiO2 principal)

Quartzite

Quartzite (SiO2)

Yellow Chert (Jasper)

Microcrystalline Quartz (SiO2)

Ferruginous Sandstone

Clastic Sedimentary Rock (Iron-rich)

Sandstone (with potential Quartzite characteristics)

Clastic sedimentary rock (primarily SiO2)

Bauxite

Bauxite (Al2O3·2H2O)

Chert (often colloquially called Flint)

Chert (Microcrystalline Quartz, SiO2)

Amber

Succinite (fossilized resin)

Chert (often called Flint or Agate nodule)

Cryptocrystalline Quartz (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Graywacke type)

Clastic Sedimentary Rock (Lithic Sandstone)

Greywacke (River Pebble)

Greywacke sandstone with quartz veining

Red Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx')

Calcium Carbonate (CaCO3)

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Granite

Granite (Felsic Plutonic Rock)

Travertine (Tufa)

Chemical Sedimentary Limestone (CaCO3)

Sandstone

Arenite (primarily SiO2, silica)

Chert (Field Stone)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

Diamond

Diamond (Pure Carbon, C)

Red Sandstone

Arenite (Ferruginous Sandstone)

Howlite (Dyed Turquoise)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Travertine

Terrestrial Sedimentary Form of Calcium Carbonate (CaCO3)

Chert (specifically Red Chert / Flint)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz