Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Fossilized oyster or bivalve shell

Fossil Gryphaeidae or Ostreoidea; calcitic shell, CaCO₃

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Chert)

Microcrystalline Quartz (SiO2)

Jasper

Quartz (SiO2)

Biotite-rich granite or granitic gneiss

Quartz–feldspar–biotite granite; possibly foliated granitic gneiss

Rose Quartz

Rose Quartz (SiO₂)

Likely polished dark stone or glassy mineral bead

Indeterminate; possibly obsidian, hematite, or a dark agate

Polished brown stone, likely smoky quartz or jasper

Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Uncertain small pale mineral fragment

Indeterminate; possibly calcite or a light-colored feldspar fragment

Weathered iron-rich rock, possibly basalt or ironstone

Uncertain; likely weathered basalt (plagioclase–pyroxene) or hematite/goethite-bearing ironstone

Weathered granite or granitic gneiss

Quartz–feldspar–mica granitic rock; possibly gneiss if foliation is present

Quartz

Silicon Dioxide (SiO2)

Red jasper in gray host rock (likely hematite-stained quartzite or rhyolite)

Jasper: microcrystalline quartz (SiO₂), with iron-oxide coloration; exact host uncertain from image

Quartz-veined Diabase or Basalt Pebble

Diabase or Basalt with Hydrothermal Quartz Veins (SiO2)

Milky quartz (likely quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2)

Chert (or possibly Flint)

Chert (variant: Flint)

Weathered granite or granitic pegmatite

Coarse-grained quartz–feldspar–mica rock; likely granite, possibly pegmatitic granite

Weathered carbonate rock, possibly fossiliferous limestone

Calcite-rich limestone (CaCO₃), tentative identification

Quartz-rich pegmatite, possibly with mica and feldspar

Granitic pegmatite; mainly quartz (SiO₂), feldspar, and biotite/muscovite mica

Cream River Jasper

Silicified microcrystalline quartz (SiO2)

Small quartz-rich rock fragment (tentative)

Quartz, silicon dioxide (SiO₂), possibly in a feldspar-bearing granite fragment

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Quartzite fragment)

Silicon Dioxide (SiO2)

Greenstone (or Greywacke/Metasediment Pebble)

Metamorphosed Mafic Rock / Chlorite Schist

Jasper

Microcrystalline Quartz (SiO2)

Quartz Pebble (with Dark Volcanic/Sedimentary Inclusion)

Silicon Dioxide (SiO2)

Asphalt (Bituminous Concrete)

Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)

Worn quartz-rich pebble, likely chert or quartzite

Microcrystalline quartz (SiO₂), possibly quartzite

Quartz (Chert/Quartzite variant)

Silicon Dioxide (SiO2)

Granite with Quartz Vein

Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)

Tiny amber-colored crystal fragment

Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral

Quartz-Veined Mudstone

Argillite or Mudstone with Quartz Veining (SiO2 in Siliciclastic Matrix)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Likely tumbled sandstone or limestone

Quartz-rich sandstone (possibly calcarenite/limestone)

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Milky Quartz

Silicon Dioxide (SiO2)

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar

Jasper-Agate Conglomerate (Potentially Puddingstone)

Jasper-cemented Silicate Aggregate (SiO2)

Weathered quartz-rich pebble

Mostly microcrystalline quartz (SiO₂), possibly quartzite or chalcedony with iron-oxide staining

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with Iron Oxide Inclusions