Not A Rock Or Mineral

Rose Quartz

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

Magnetite (potentially as a Lodestone or within Ironstone)

Magnetite (Fe3O4)

Flower Agate

Chalcedony with Opaque Spherulitic Inclusions (SiO2)

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Limonite-stained Quartz / Quartzite

Silicon Dioxide (SiO2) with iron hydroxides (FeO(OH)·nH2O)

Gneiss (Metamorphic Rock)

Gneiss (high-grade regional metamorphic rock)

Quartz Pebble (with Manganese dendrites/staining)

Silicon Dioxide (SiO2) with Manganese Oxide impurities

Gold Nugget

Native Gold (Au)

Blue Agate (Tumbled and Dyed)

Silicon Dioxide (SiO2) with likely organic dyes

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Flower Agate (Cherry Blossom Agate)

Chalcedony (Silicon Dioxide) with Opaque Inclusions - SiO2

Cloud Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Bloodstone (also known as Heliotrope)

Silicon Dioxide (SiO2) - variety of Chalcedony

Bumblebee Jasper

Fossiliferous Calcite containing Orpiment and Realgar

Limonite-stained Chert

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)

Petrified Wood

Silicified Wood (primarily SiO2)

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Serpentinite

Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4

Greenschist with Quartz Veining

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

Moss Agate

Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

Milky Quartz

Milky Quartz (Silicon Dioxide, SiO2)

Pink Granite

Felsic intrusive igneous rock (composition: SiO2 and Al2O3)

Pink Fluorite

Fluorite (Calcium Fluoride) - CaF2

Flower Agate

Chalcedony (Silicon Dioxide) with Plume Inclusions, SiO2

Wonderstone

Rhyolite (Silicon Dioxide with Iron Oxide impurities)

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Sandstone (Pebble)

Arenite (primarily SiO2)

Granite

Phaneritic Plutonic Felsic Rock (major components: SiO2 and Al2O3)

River Pebble (likely Quartzite or Chert)

Silicon Dioxide (SiO2) crystal conglomerate

Fossil Sand Dollar (Echinoidea)

Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Quartzite (River Pebble)

Meta-quartzite (composed primarily of SiO2)

Granite (Dioritic variant)

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