Anthropogenic Specimen (Man Made Material)

Pink Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Granite

Granite (a phaneritic intrusive igneous rock)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

Granite

Granite (Silicic Intrusive Igneous Rock)

Banded Chert / Flint

Silicon dioxide (SiO2)

Red Sandstone (Siltstone/Mudstone variety)

Ferruginous Sandstone (composed primarily of Quartz with Hematite cementation)

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.

Jasper

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

Sandstone

Arenite (SiO2 based typically)

Brecciated Jasper

Silicon Dioxide (SiO2) with varying mineral inclusions (Iron Oxide, Hematite, Clay)

Rough Diamond

Diamond (pure Carbon, C)

Chert (Brecciated or Veined)

Silicon Dioxide (SiO2)

Diamond (set in Gold)

Diamond (pure carbon, C)

Chert (or possibly Flint)

Chert (variant: Flint)

Diamond Plate (Steel)

Alloyed Carbon Steel or Aluminum with 'Durbar' pattern

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Chert (Quartz Variety)

Chert (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)

Blue Quartzite

Quartzite with inclusions (SiO2)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Fossilized Coral (Petoskey-style)

Hexagonaria percarinata (Fossilized Rugose Coral)

Quartzite Pebble

Quartzite (predominantly Silicon Dioxide - SiO2)

Sea Shell (Fighting Conch Fragment)

Calcium Carbonate (CaCO3) - Strombus alatus fragment

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

Natural Pearl (appearing in a jewelry setting)

Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin

Chert / Pink Chert

Silicon Dioxide (SiO2)

Chert Pebble / Brachiopod Fossil Internal Mold

Silicon Dioxide (SiO2) / Fossil: Brachiopoda (generic internal mold)

Marble

Metamorphic Limestone (CaCO3)

Granite

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Chert / Flint

Silicon Dioxide (SiO₂)

Rough Diamond

Diamond (pure Carbon, C)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Blue Sphalerite (likely dyed or treated Druzy Quartz/Agate)

Zinc Sulfide (ZnS) or Silicon Dioxide (SiO2) with trade-name enhancement

Glazed Ceramic Tile

Fused Silicate-Clay composite

Basalt

Basalt (Mafic volcanic rock)

Chert (Flint Pebbles)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Blue Goldstone

Aventurine Glass