Multiple

Gemstone Ring

Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)

Mixed rock and mineral collection

Unidentified assortment of geological specimens; individual species cannot be determined from the image

Coarse sand with a small pebble

Unconsolidated siliciclastic sediment, chiefly quartz and rock fragments

Weathered granite pebble

Granite, a coarse-grained felsic intrusive igneous rock

Quartzite Pebble

Quartzite (primarily SiO2)

Mixed Gravel and Pebbles

Polylithic Alluvial Aggregate

Piddock bored rock (likely Mudstone or Shale)

Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock

Botryoidal Chalcedony / Agate

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Mixed beach gravel and sand

Unsorted siliciclastic sediment, chiefly quartz and rock fragments

Rounded river pebbles (mixed lithologies)

Water-worn clasts; individual stones cannot be identified precisely from the image

Quartzite River Rock

Quartzite (primarily SiO2)

Lapis Lazuli

(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Complex silicate rock)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Dark, coarse-grained rock (possibly diorite or amphibolite)

Undetermined; likely a mafic to intermediate rock containing plagioclase and dark amphibole or pyroxene

Quartzite Pebble

Quartzite (SiO2)

Quartzite Pebble

Quartzite (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Lapis Lazuli

(Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)

Hag Stone

Perforated Flint or Chert (SiO2)

Fossilized Shark Teeth in Matrix

Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Small dark, speckled stone (likely granite or diorite)

Likely fine-grained granitoid; exact identification is uncertain from the small, blurry view

Unidentified small rock or mineral fragment

Indeterminate from the blurred image; possibly quartz-rich stone, feldspar, or weathered concrete-like geological material

Mixed rounded gravel and pebbles

Polymictic clasts, likely including granite, basalt, quartzite, sandstone, and schist

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Banded Igneous Dike Rock

Intrusive igneous rock with felsic/mafic banding

Mixed Mineral Collection

Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)

Likely raw quartz-bearing stone, possibly greenish quartz or calcite

Uncertain from photograph; possible quartz (SiO₂) or calcite (CaCO₃)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Red Quartzite River Rock

Metamorphic Quartzite (SiO2)

Red Jasper

Chalcedony (SiO2) with iron inclusions

Quartzite Cobble

Quartzite (primarily SiO2)

Crazy Lace Agate

SiO2 (Silicon Dioxide) - Chalcedony variety

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Uncertain small stone; possibly weathered quartz-bearing rock

Indeterminate from image; candidate materials include quartz-rich pebble or altered silicate rock

Lapis Lazuli

Lapis lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Sandstone (Pebble / Cobble)

Arenite / Sedimentary Rock (composed of quartz and feldspar)

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Jasper

Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)