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

Carnelian

Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)

Chrysoprase

Chrysoprase (a variety of Chalcedony, SiO₂)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)

Jasper

Jasper (a variety of Chalcedony, SiO2)

Galena

Galena (Lead Sulfide), PbS

Brecciated Quartzite

Brecciated Quartzite

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica)

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Banded Gneiss

Gneiss

Chrysoprase

Chalcedony (cryptocrystalline quartz) with nickel inclusions; SiO2

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)

Granite or Granodiorite (weathered fieldstone)

Granitoid

Quartz Druzy on Agate (River Cobble)

Silicon Dioxide (SiO2)

Gneiss (likely)

Gneiss

Marble

Metamorphosed Limestone/Dolomite

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)

Amber with inclusion

Amber (Fossilized Tree Resin)

Pink Anthracite Coal (dyed)

Anthracite Coal (Artificially Colored)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Botryoidal Chalcedony

Chalcedony (SiO2)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Jasper (likely a variety of Yellow or Mustard Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Chert (Arrowhead Fragment)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Tiger's Eye (commonly referred to as Blue/Gold Tiger's Eye)

Tiger's Eye is a variety of Chalcedony (cryptocrystalline quartz), SiO2, exhibiting chatoyancy. The blue variety is often called Hawk's Eye.

Jasper Conglomerate

Jasperoid Conglomerate (predominantly SiO2 with iron oxide impurities)

Pyrite

Pyrite (FeS2)

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Banded Gneiss

Gneiss (variable mineral composition)

Gneiss

Gneiss (pronounced 'nice')

Banded Iron Formation (BIF)

Banded Iron Formation

Calcite (likely a tumbled specimen)

Calcite (CaCO 3 )

Red Tiger's Eye beads

Tiger's Eye (variety of Chalcedony, SiO2)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

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.

Jasper and Aquamarine (likely)

Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))

Ironstone (possibly Bog Iron or Limonite)

Goethite-rich Ironstone (FeO(OH))

Ferruginous Sandstone (with Pyrite/Gold associations)

Ferruginous Arenite (SiO2 + Fe2O3)