Mineral Like Byproduct

Granite Pegmatite

Phaneritic Plutonic Igneous Rock

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

Obsidian

Obsidian (Volcanic Glass)

Native Copper

Native Copper (Cu)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

Biotite Mica

K(Mg, Fe)3AlSi3O10(F, OH)2

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Sandstone

Sandstone (clastic sedimentary rock, predominantly SiO2)

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

Quartz on Schist

Silicon Dioxide (SiO2) on Foliated Metamorphic Rock

Limonite and Goethite on Gossan

FeO(OH)·nH2O

Kimberlite with Diamond

Kimberlite (Porphyritic Peridotite)

Garden Quartz (Lodalite)

Silicon Dioxide (SiO2) with various inclusions

Calcite (Yellow/Orange variety - sometimes called Honey Calcite)

Calcite

Pegmatite (with Quartz and Feldspar)

Granitic Pegmatite

Garden Quartz (Phantom Quartz)

Silicon Dioxide (SiO2) with inclusions (Chlorite, Feldspar, Goethite, Hematite)

Concretion (Sandstone)

Sandstone Concretion

Biotite Schist

Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Gossan (Iron Hat) with Quartz and Chlorite

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

Greenstone

Greenschist (containing chlorite, epidote, and actinolite)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive volcanic rock)

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxide

Schist

Mica Schist

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

African Turquoise (Jasper)

Silicon Dioxide (SiO2) - Macro-crystalline Quartz with inclusions

Amygdaloidal Basalt

Amygdaloidal Basalt (with secondary mineral infilling)

Bauxite

Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))

Dendrite (Manganese Oxide Dendrites)

Psilomelane or Pyrolusite on Matrix (typically MnO2)

Manganese Oxide Crust on Limestone

Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3

Quartz Geode Fragment

Silicon Dioxide (SiO2) in a Sedimentary Host

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Limonite Concretion

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2)

Chrysocolla on Matrix

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Schist

Mica Schist