Man Made Rock Like Material

Granite featuring Quartz Vein

Granite with hydrothermal silica (SiO2) intrusion

Serpentinite

Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)

Limonite-stained Chert/Jasper

Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Granite

Phaneritic plutonic rock (dominated by Quartz, Feldspar, and Mica)

Red Jasper

Jasper (Silica/Microcrystalline Quartz with Hematite inclusions), SiO2

Quartzite

Quartzite (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Sandstone (with potential mineral inclusions)

Clastic sedimentary rock (primarily Quartz, SiO2)

Chert / Flint

Chert (Silicon Dioxide, SiO2)

Jasper

Silicon dioxide (SiO2)

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (Flint/Chalcedony)

Microcrystalline Quartz (SiO2)

Bauxite Ore

Hydrated aluminum oxides (e.g., Gibbsite Al(OH)3, Boehmite ̲̲̲̲AlOOH, Diaspore ̲̲̲̲AlOOH)

Chert / Flint

Microcrystalline Quartz (SiO2)

Banded Chert

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Bauxite (Laterite Clay)

Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))

Gold and Diamond

Native Gold (Au) and Diamond (C)

White Marble

Recrystallized Calcite (CaCO3)

Arkosic Sandstone

Arkose

Chert / Jasper

Microcrystalline Quartz (SiO2)

Vesicular Basalt

Extrusive Mafic Igneous Rock (Vesicular Basalt)

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Siltstone

Siltstone (primarily composed of SiO2 with various clay minerals)

Massive Quartz (Milky or Gray)

Silicon Dioxide (SiO2)

Oolitic Limestone

Oolite (Sedimentary Calcium Carbonate)

Labradorite (Polished Crystal Point)

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Crazy Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Unakite

Unakite (Epidote-Feldspar rock)

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Diamond

Native Carbon (C)

Basalt Porphyry

Porphyritic Basalt

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Turquoise and Red Coral

Turquoise: CuAl6(PO4)4(OH)8·4H2O; Red Coral: Corallium rubrum (organic gemstone)

Granite

Granite (Felsic Plutonic Rock)

Bivalve Fossil (Clam/Mollusk)

Class: Bivalvia (Order: Veneroida), Calcium Carbonate (CaCO3)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Banded Sandstone (Liesegang Rings)

Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)

Hag Stone

Perforated Chert (Microcrystalline Silica, SiO2)

Quartz Geode

Silicon Dioxide (SiO2) in Geode form