Man Made Material (Anthro Lithic Product)

Sandstone (Lithic Arenite)

Clastic Sedimentary Rock (primarily SiO2)

Carved pyrite frog or toad

Pyrite (iron disulfide, FeS₂), likely a carved massive aggregate

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Moissanite

Silicon Carbide (SiC)

Colorless faceted gemstone, likely quartz

Quartz (SiO₂), probably rock crystal; exact identification is uncertain from the strongly backlit image

Copper-bearing rock, possibly native copper in a weathered matrix

Likely copper minerals such as malachite (Cu₂CO₃(OH)₂) in an iron-rich host; exact identification is uncertain from the image

Weathered iron-rich rock, possibly laterite or altered basalt

Probable ferruginous basalt/lat eritic material; exact identification requires testing

Iron-stained quartz-rich rock, possibly weathered granite or pegmatite

Quartz–feldspar rock with iron-oxide alteration; exact identification is uncertain from the photograph

Weathered quartz-rich rock, possibly quartzite or silicified breccia

Quartzite (predominantly SiO₂); exact identification requires a fresh surface and tests

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)

Scoria (volcanic cinder)

Scoria, vesicular basaltic-to-andesitic volcanic rock

Weathered sandstone fragment

Quartz-rich sandstone, likely arkosic or lithic sandstone

Chert

Microcrystalline Quartz (SiO2)

Likely blue-green kyanite crystal

Kyanite, Al₂SiO₅

Blue kyanite in matrix

Kyanite, Al₂SiO₅

Tumbled milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Siltstone

Siltstone (primarily composed of microcrystalline Quartz and Feldspar)

Pumice

Pumice (Volcanic Glass)

Limestone

Calcium Carbonate (CaCO3)

Sandstone

Sedimentary Rock (Quartz arenite / Lithic sandstone)

Tumbled granite (likely granite or granitic gneiss)

Granite; chiefly quartz (SiO₂), feldspar, and mica, with possible alteration minerals

Red jasper (tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (Flint Arrowhead)

Microcrystalline Quartz (SiO2)

Scoria (Lava Rock)

Scoria (Extrusive Igneous Rock / Mafic Silicates)

Coquina

Bioclastic Limestone

Iron-rich weathered rock (probable limonite/goethite)

Limonite, a mixture dominated by goethite (FeO(OH)) and related hydrated iron oxides

Quartzite

Quartzite (primarily SiO2)

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Chert (Green Jasper)

Microcrystalline Quartz (SiO2) with iron silicate inclusions

Iron-rich breccia (likely limonite/goethite-stained rock)

Ferruginous breccia; iron oxides/hydroxides such as goethite (FeO(OH)) and limonite, with unidentified rock fragments

Slag

Ferrous slag (by-product of iron smelting)

Chert (White Chert/Flint)

Microcrystalline Quartz (SiO2)

Chert (variations include Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (White Variety)

Microcrystalline Silica (SiO2)

Flint (chert)

Microcrystalline quartz (SiO₂), a variety of chert

Chert

Microcrystalline Quartz (SiO2)

Weathered quartz-rich rock fragment

Likely quartz-bearing feldspathic rock; exact identification requires testing

Polished black-and-gold brecciated stone, likely sheen obsidian or brecciated jasper

Probable volcanic glass (obsidian), SiO₂, with iron-oxide or rhyolitic inclusions; exact identification is uncertain from the photograph

Weathered blue-speckled granite or granitic rock

Granite, likely quartz–feldspar–mica aggregate; blue grains may be sodic feldspar or altered minerals