Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)

Rose Quartz

Silicon dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Agate Geode

Microcrystalline Quartz (SiO2)

Milk Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite

Phaneritic Plutonic Felsic Rock (Granite)

Sandstone

Arenite (SiO2, often with CaCO3 or Fe2O3 cement)

Sandstone

Arenite (primarily SiO2)

Agate (specifically Chalcedony nodule)

Silicon Dioxide (SiO2)

Granite

Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Red Siltstone (or Red Shale)

Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Lepidolite on Pegmatite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Granitic Pegmatite

Blue Lace Agate (often dyed)

Silicon dioxide (SiO2) - variety of chalcedony

Smoky Quartz

SiO2 (Silicon Dioxide)

Basalt with Scoria/Vesicular Texture

Vesicular Basalt (Iron-rich/Oxidized)

Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Snowflake Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with Cristobalite inclusions)

Hematite

Iron(III) oxide (Fe2O3)

Sandstone (Pebble)

Clastic sedimentary rock (SiO2 primary)

Nuummite

Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)

Chalcedony (Agate/Chert)

Silicon Dioxide (SiO2)

Chert Pebble (Jasper variant)

Microcrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2)

River Cobble (likely Basalt or Metagraywacke)

Non-specific water-worn lithic fragment

Smoky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Double Terminated)

Silicon Dioxide (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

Flower Agate (Plume Agate)

Chalcedony (Silicon Dioxide) with Spherulitic Inclusions - SiO2

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (containing Glauconite, (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Diabase (Dolerite) Cobble

Diabase / Dolerite

Brachiopod Fossil (Spiriferid)

Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)

Porphyritic Basalt (with Quartz or Calcite inclusion)

Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)