Mineral Like (Anthropogenic)

Pegmatite with Smoky Quartz and Feldspar

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)

Lepidolite

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

Rough White Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Diamond

Natural Carbon (C)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

Diamond (Faceted)

Diamond (Carbon, C)

Milky Quartz

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Partial)

Elasmobranchii (fossil tooth fragment)

Limonite (Iron Ore)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Bauxite

Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)

Blue Slag Glass

Ferro-silicate glass (Slag)

Banded Sandstone

Quartz-rich Arenite Sandstone

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Oyster Shell (Aragonite/Calcite)

Calcium Carbonate (CaCO3)

Banded Chert

Silicon dioxide (SiO2)

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Gneiss with Orthoclase Feldspar

Gneissic Metamorphic Rock with K-Feldspar inclusions

Rhyolite with Lithophysae and Iron Oxide

Extrusive igneous rock / Felsic volcanic rock

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Rough Quartz Crystal in Matrix

Silicon Dioxide (SiO2)

Pyrite Sun

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Granite

Course-grained intrusive igneous rock

Chrysocolla in Matrix

Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O))

Blue Crackle Quartz (Dyed Fire Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye treatment

Dioptase

Dioptase (CuSiO3 · H2O)

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or limonite inclusions

River Cobble (likely Basalt or Greenstone)

Mafic Igneous Rock (with possible chloritic alteration)

Red Sandstone

Arenite (primarily SiO2 with hematite/iron oxide coating)

Basalt with Calcite Veining

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Gneiss

Gneiss

Sandstone

Sedimentary Rock (Quartz arenite)

Bumblebee Jasper

Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)

Sandstone

Arenite (SiO2 primarily)

Green Aventurine

Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix