Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)

Garnet (likely Almandine)

Almandine Garnet, Fe3Al2(SiO4)3

Greenstone (Epidote/Chlorite Rich Rock)

Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Firewood (Wood Log)

Lignum (Plant tissue composed of cellulose and lignin)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Yellow Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Chrysocolla

Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 with iron oxide inclusions)

Flint Nodule

Microcrystalline Quartz (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Rough Diamond

Carbon (C)

Banded Calcite (often sold as Onyx)

Calcite (Calcium Carbonate, CaCO3)

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Basalt with Calcite Veins

Basalt (containing CaCO3 inclusions)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Chert (Arrowhead Debitage or Flake)

Microcrystalline silica (SiO2)

Diamond (or Diamond Simulant)

Carbon (C) - Native Element

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Turritella (Gastropod Fossil)

Turritella (Genus of gastropods), CaCO3 (Calcium Carbonate or Silicified Agate)

Quartzite Cobble

Metamorphosed Quartz Sandstone (primarily SiO2)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

River Stone (likely Siltstone or fine-grained Basalt)

Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)

Botryoidal Chalcedony Geode

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Quartz Geode (Cracked)

Silicon Dioxide (SiO2)

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock

Sandstone (with garnet granules)

Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)

Pumice

Vesicular volcanic glass

General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)

Anhydrite (Calcium Sulfate, CaSO4)

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Weathered Sandstone with Algae Growth

Arenite

Basalt with Quartz Veins

Basalt (complex silicate) with Quartz (SiO2) intrusions

Beryl (Emerald Variety)

Beryllium aluminum silicate (Be3Al2Si6O18)

Diamond

Native Carbon (C)

Garnet (specifically Almandine)

Almandine (Fe3Al2(SiO4)3)

Chert (Flint nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Amber

Succinate (Fossilized Tree Resin)

Ferruginous Sandstone

Arenite with Hematite/Limonite cement