Multiple

Gemstone Ring

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

Mixed Gravel and Pebbles

Polylithic Alluvial Aggregate

Quartzite Pebble

Quartzite (primarily SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Botryoidal Chalcedony / Agate

Silicon Dioxide (SiO2)

Lapis Lazuli

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

Quartzite River Rock

Quartzite (primarily SiO2)

Piddock bored rock (likely Mudstone or Shale)

Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock

Quartzite Pebble

Quartzite (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Lapis Lazuli

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

Quartzite Pebble

Quartzite (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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

Rose Quartz

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

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)

Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

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 (SiO2) with impurities (mostly Iron Oxides)

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Hag Stone

Perforated Flint or Chert (SiO2)

Fossilized Shark Teeth in Matrix

Cretaceous Chondrichthyes (Shark) remains in Sedimentary Matrix

Crazy Lace Agate

SiO2 (Silicon Dioxide) - Chalcedony variety

Granite

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

Mixed Mineral Collection

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

Mixed mineral and rock collection

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

Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)

Copper-bearing polymetallic mineral aggregate (Cu-minerals)

Quartzite river pebble

Quartzite (SiO2)

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Quartzite pebble

Metamorphic Quartzite (SiO2)

Quartzite Pebble

Quartzite (mostly SiO2)

Quartzite Pebble

Quartzite (SiO2)

Quartzite Pebble

Quartzite (SiO2)

Fluorite Bracelet

Calcium Fluoride (CaF2)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Botryoidal Chalcedony (Geode fragment)

Silicon Dioxide (SiO2)