Metamorphic (Likely Gneiss Or Schist Based On Texture)

Greenstone / Chert

Cryptocrystalline Quartz (SiO2) or Altered Basalt

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Aventurine (Green Aventurine)

Quartz with Fuchsite Inclusions (SiO2)

Jasper (Green Jasper / Bloodstone variant base)

Silicon Dioxide (SiO2) with impurities of chlorite and iron oxides

Basalt

Basalt

Jasper and Quartzite Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Granite

Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)

Quartzite

Quartzite (primarily SiO2)

Granite Pebble

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Sandstone (Pebble/Conglomerate fragment)

Sandstone (clastic sedimentary rock)

River Rock

Sedimentary Rock (various compositions)

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Green Aventurine

Aventurine (Silicon dioxide, SiO₂)

Greenstone (possibly Basalt or Greenschist)

Greenschist (composed primarily of chlorite, actinolite, and epidote)

Basalt

Basalt

Granite

Granite (a plutonic igneous rock)

Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)

Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates

Jasper, Agate, Quartz Mix (Polished Beads)

SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.

Quartzite

Quartzite

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

Jade

Jadeite or Nephrite

Tiger's Eye

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)

Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)

Gossan (Iron Hat)

Limonitic Gossan (predominantly FeO(OH)·nH2O)

Serpentine

Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄

Marble

Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)

Serpentinite

Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)

Strawberry Quartz

Quartz (SiO₂) with Goethite (α-FeO(OH)) and/or Lepidocrocite (γ-FeO(OH)) inclusions

Red Jasper (with Quartz Veins)

Jasper (var. chert, SiO₂)

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Coquina

Coquina (a type of limestone)

Soapstone

Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)

Basalt

Basalt

Tiger's Eye (Rough)

Silicon Dioxide (SiO2) with fibrous crocidolite / Limonite inclusions

K2 Azurite Granite / K2 Stone

Granite (igneous rock) with Azurite inclusions (mineral)

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Serpentine

Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Unakite

Epidote-Feldspar rock (specifically, a variety of granite)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Jasper (with orbicular/unakitoid tendencies)

Silicon Dioxide (SiO2) with iron and epidote inclusions