Mineral, Specifically A Rock Fragment

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

Mammoth Tooth Fragment

Mammuthus primigenius (fossilized dentin and enamel)

Small brown mineral fragment (undetermined)

Unidentified; image detail is insufficient for a reliable species identification

Pink Granite

Phaneritic Plutonic Rock (Felsic)

Small red-brown mineral or rock fragment

Unidentified; possibly iron-oxide-rich jasper, garnet, or weathered sulfide

Feldspar (specifically Orthoclase)

Potassium aluminum silicate (KAlSi3O8)

Crazy Lace Agate

Chalcedony (SiO2) with microcrystalline quartz

Small brown pebble or possible shell fragment

Unidentified natural clast; the image is too small and blurred for reliable identification

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

River Pebble

Siliceous rock fragment

River Pebble

Weathered Rock Fragment

Unidentified brown rock fragment

Not identifiable from the image; possibly iron-stained sandstone or another common weathered rock

Small tan stone (undetermined)

Unidentified fine-grained geological material; species cannot be determined from the image

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Chert (Nodule fragment)

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18)

Limestone (specifically a Crushed Aggregate fragment)

Calcium Carbonate (CaCO3)

Green Aventurine

Quartz with Fuchsite inclusions (SiO2)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Weathered rock fragment

Undetermined; possibly a coarse-grained granitoid

Banded Agate (Onyx type)

Silicon Dioxide (SiO2)

Nuummite

Nuummite (ortho-amphibole rock)

Honey Calcite

Calcium Carbonate (CaCO3)

Small weathered rock fragment, possibly quartz-rich

Unidentified lithic fragment; species cannot be determined from the image

Chert (Arrowhead Fragment)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Sandstone Concretion (Omar or Nut Rock)

Sedimentary Concretion (specifically an 'Omarolluk' or Omar)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Quartz Druzy

Silicon Dioxide (SiO2)

Thunderegg (specifically a Jasper/Agate-filled Geode nodule)

Silicon Dioxide (SiO2) within Rhyolitic Matrix

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Possible fossilized shell or coral fragment

Indeterminate biogenic carbonate, likely calcite (CaCO₃)

Amethyst (Rough)

Silicon Dioxide with iron impurities (SiO2)

Green Aventurine

Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions

Pink Granite

Granite (Phaneritic Quartz-Feldspar rock)

Likely water-worn gray pebble

Not identifiable to a specific rock from this image; possibly fine-grained basalt or another dark river-worn rock

Small pale rock fragment

Indeterminate; possibly quartz, calcite, or a weathered feldspar-rich fragment

Small rounded mineral/rock fragment

Indeterminate; possibly quartz-rich stone or feldspar

Likely rough mineral specimen (possibly mica-rich)

Indeterminate from the image; a mica such as muscovite or biotite is one possibility

Likely pink feldspar-rich granite or pegmatite fragment

Uncertain from the image; possibly potassium feldspar (orthoclase/microcline) with quartz