Not A Natural Rock (Man Made Composite)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Fossiliferous Limestone (Coral Fossil)

Scleractinian Coral in Calcium Carbonate (CaCO3)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Limonite (Iron Stone/Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Industrial Diamond (Bort or Boart)

Diamond (pure Carbon, C)

Jasper

Jasper (Cryptocrystalline Quartz; SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Rose Quartz

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

Satin Spar (Selenite variant)

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Quartzite

Quartzite (primarily SiO2)

Black Freshwater Pearls

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

Limonite (Yellow Ochre)

Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)

Rough Diamond

Carbon (C)

Amethyst/Smoky Quartz Cluster

Silicon Dioxide (SiO2)

Granodiorite (River Rock / Cobble)

Granodiorite; Phaneritic intrusive igneous rock dominated by plagioclase, quartz, and hornblende/biotite

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Bismuth Crystal

Bismuth (Bi)

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with Iron impurities)

Massive Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Amber

Succinite (Formula: C10H16O)

Paraiba Tourmaline

Elbaite Tourmaline (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) - Copper-bearing

Rose Quartz

Silicon Dioxide (SiO2)

Rose Quartz

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

River Cobble (likely Basalt)

Mafic Igneous Rock (Aphanitic)

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)

Granite

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

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

Gold

Native Gold (Au)

Amethyst and Citrine (Ametrine Mix)

Silicon Dioxide (SiO2) with Fe3+ impurities

Diamond

C (Carbon)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Banded Calcite (often sold as 'Mexican Onyx')

Calcite (Calcium Carbonate - CaCO3)

Rose Quartz

Silicon Dioxide (SiO2)

Granite

Granite