Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)

Quartz

Quartz (Silicon Dioxide - SiO2)

Limestone

Calcium Carbonate (CaCO3)

Mica Schist

Mica Schist

Banded Iron Formation (BIF) with Quartz

Banded Iron Formation, often composed of alternating layers of hematite (Fe2O3) or magnetite (Fe3O4) and chert (microcrystalline quartz, SiO2)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

Red Jasper

Jasper (a variety of Quartz, SiO2)

Quartz (likely milky/gray variety)

Quartz (SiO₂)

Lignite (Brown Coal)

Humic Lignite (Carbonaceous sedimentary rock)

Marble (Carrara style)

Recrystallized Calcite-rich Metamorphic Rock (CaCO3)

Petrified Wood

Silicified Wood (primarily SiO2)

White Agate (Chalcedony)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Petrified Wood

Silicified Wood (SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Copper-bearing Mica Schist

Mica Schist with Native Copper inclusions

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

Greenschist

Greenschist facies rock

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

Petrified Wood

Silicified Wood (SiO2)

Jasper (Green variety)

Silicon Dioxide (SiO₂)

Chert Pebble (Jasper variant)

Microcrystalline Quartz (SiO2)

Banded Iron Formation

Banded Iron Formation (BIF)

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Quartz

Quartz (SiO₂)

Grey Slate

Foliated Metamorphic Rock (formed by low-grade regional metamorphism of shale or mudstone)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Quartz (on matrix)

Quartz (Silicon Dioxide, SiO₂)

Desert Rose (Gypsum Variety)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Carnelian

Carnelian (SiO2 with Iron Oxide impurities)

Banded Iron Formation

Banded Iron Formation (BIF)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Clay (as a rock-forming material)

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

Mica Schist

Mica Schist (predominantly Muscovite/Biotite)

River/Stream Pebble

Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Dolomite

Dolomite (CaMg(CO3)2)

Jasper River Pebble

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Red Jasper (beads)

Silicon Dioxide (SiO2) with iron inclusions