Metamorphic Or Sedimentary Depending On Local Grade

Quartz Vein in Amphibolite / Gneiss

Quartz (SiO2) in Mafic Metamorphic Host Rock

Schist

Mica Schist

Sandstone (Feldspathic / Arkose)

Sandstone (SiO2 with variable mineral grains)

Feldspathic Gneiss

High-grade Metamorphic Rock (Gneiss)

Gneiss

High-grade metamorphic rock (Gneiss)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Limonite Bog Iron

Hydrated iron oxide-hydroxide, FeO(OH)·nH2O

Mookaite Jasper

Mookaite (Silicified radiolarite, SiO2)

Greenstone / Greenschist

Greenschist facies metamorphic rock

Quartz

Silicon Dioxide (SiO2)

Mookaite Jasper

Silicified Porcellanite (SiO2 with impurities)

Tumbled Mixed Gemstones and Rocks

Various mineral species including quartz (SiO2) and silicate minerals

Mica Schist

Mica Schist (Quartz-Mica Metamorphic Rock)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone

Iron oxides/hydroxides, chiefly limonite/goethite (FeO(OH)·nH₂O), with a probable silicate or clay matrix

Pyrite in Slate

Iron Disulfide (FeS2) in Low-grade Metamorphic Rock

Polished banded gneiss, possibly garnet-bearing

Gneiss; composition likely quartz–feldspar–mica, with accessory amphibole or garnet

Gneiss

High-grade regional metamorphic rock (Foliated)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Kyanite

Kyanite (Al2SiO5)

Ironstone Concretion

Siderite / Hematite-bearing Sedimentary Rock

Red Shale

Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)

Banded Gneiss

Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Banded gray stone, likely slate or fine-grained metamorphic rock

Probably slate or phyllite; composition commonly mica, quartz, and clay-derived minerals

Mica Schist

Mica Schist (varies based on mineral makeup, often Biotite/Muscovite schist)

Fossilized Echinoid (Sea Urchin)

Echinoidea (Class)

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (Chert/Flint)

Milky Quartz

Silicon Dioxide (SiO2)

Kyanite in Quartz

Al2SiO5 in SiO2

Limonite and Goethite encrusted Chert/Ironstone

Hydrated Iron Oxide (FeO(OH)·nH2O) with cryptocrystalline Silica (SiO2)

Banded gneiss

Gneiss, commonly quartz–feldspar–mica gneiss

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with iron oxide and silicate impurities

Native Gold Nugget

Gold (Au)

Gneiss

Gneiss (High-grade metamorphic rock)

Gold-bearing quartz vein rock (probable pyrite-bearing quartzite)

Quartz (SiO₂) with probable pyrite (FeS₂) and possible native gold

Banded Gneiss

Gneiss (Metamorphic Rock)

Slate

Foliated Metamorphic Slate

Gneiss (with Quartzite layers)

Gneissic Metamorphic Rock