Anthropogenic (Man Made Material Mimicking Sedimentary Rock)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Grey Slate

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

Weathered sandstone pebble

Quartz-rich sandstone, likely ferruginous sandstone

Sandstone

Arenite or Sandstone

Chert (White/Light Tan)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Laterite (iron-rich nodule, possibly Bauxite as a subtype)

Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)

Opalite

Synthetic Opalized Glass

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Quartz (in a rock matrix)

Quartz (SiO2)

Pebble (river rock/beach pebble)

Pebble (clast size class)

Tumbled ocean jasper or orbicular jasper

Microcrystalline quartz (SiO₂), commonly with chalcedony, feldspar, and iron-oxide inclusions

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz

SiO₂ (Silicon Dioxide)

Weathered limestone or calcareous concretion

Calcite-rich carbonate rock; primarily calcium carbonate (CaCO₃), commonly calcite

Mixed river gravel (alluvial conglomeratic sediment)

Polymictic alluvium; composition includes quartz, feldspar, chert, granite, basalt, and metamorphic rock fragments

Quartz

Quartz (SiO₂)

Red Jasper (beads)

SiO₂ (Silicon Dioxide)

Vesicular basalt (likely amygdaloidal basalt)

Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, clinopyroxene, and commonly olivine; vesicles are partly mineral-filled amygdules.

Zebra Jasper

Silicon dioxide (SiO2) with various impurities

Mixed rock and mineral collection

Mixed lithologies; likely quartz, feldspar, basalt, granite, chert, sandstone, and metamorphic rocks

Jasper River Pebble

Silicon Dioxide (SiO2)

Sandstone

Quartz Arenite (a common type of sandstone, given the appearance), Arkose, Greywacke (depending on mineralogy)

Nuummite

Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)

Sandstone (likely a river or beach pebble)

Sandstone (a clastic sedimentary rock)

Dendritic Agate (or Dendritic Opal)

SiO2 (for Agate), SiO2·nH2O (for Opal)

Honeycomb Coral Fossil (Favosites)

Favosites alpenensis

Iron-stained limestone or coral fragment

Calcite-rich carbonate rock; chiefly CaCO₃ (exact identification is uncertain from the image)

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Opalite

Man-made opalized glass

Quartz

Quartz (SiO2 - Silicon Dioxide)

Petrified Wood

Silicified wood (Quartz / Chalcedonized wood, SiO2)

Chert (Jasper Variant likely)

Silicon Dioxide (SiO2)

Weathered iron-rich sandstone or lateritic rock

Quartz-rich sandstone with iron-oxide/hydroxide cement; possible goethite-bearing laterite

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Quartz

Silicon Dioxide (SiO₂)

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Chert (Yellow Jasper/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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)

Pale green tumbled mineral fragment, likely serpentine or green calcite

Probable serpentine-group mineral (Mg3Si2O5(OH)4) or, less likely, calcite (CaCO3); identification is uncertain from the photograph