Basalt

Carnelian

SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8

Amethyst Geode

Silicon dioxide (SiO2) with iron impurities

Magnetite

Iron(II,III) oxide (Fe3O4)

Quartz Geode (partially formed)

Silicon Dioxide (SiO2)

Greenschist

Greenschist (Chlorite Schist)

Greenstone / Metabasalt

Metamorphosed Mafic Rock (Greenschist facies)

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Greenstone

Greenschist (commonly containing Chlorite, Actinolite, and Epidote)

Greenschist

Greenschist (Major minerals include Chlorite, Actinolite, and Epidote)

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Greenstone

Greenschist (composed of chlorite, actinolite, and epidote)

Plagioclase Feldspar

Plagioclase Feldspar Series (NaAlSi3O8 - CaAl2Si2O8)

Greenschist / Greenstone

Greenschist facies metabasite

Greenstone (Greywacke or Nephrite Jade variant)

Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)

Gabbro

Phaneritic Basic Igneous Rock (composed primarily of pyroxene and calcium-rich plagioclase)

Diorite (Salt and Pepper Rock)

Diorite (comprising Plagioclase Feldspar, Hornblende, and Biotite)

Granodiorite

Granodiorite

Zebra Jasper

Jasper (variety of Quartz/Chalcedony), SiO2

Gabbro

Phaneritic Basic Igneous Rock

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Banded Agate

Agate (Silicon Dioxide, SiO2)

Peridot

Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4

Olivine (Peridotite)

Magnesium iron silicate (Mg, Fe)2SiO4

Granite

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Basalt with Iron Oxidation

Extrusive Mafic Igneous Rock (composed of Plagioclase and Pyroxene)

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Gabbro (likely with Pyrite/Sulfide mineralization)

Mafic Intrusive Igneous Rock

Gabbro

Phaneritic mafic intrusive igneous rock

Diabase (Dolerite) Cobble

Diabase / Dolerite

Greenstone / Metagraywacke

Metamorphosed basaltic or sedimentary rock (Complex Silicate)

Blue Sapphire (likely lab-grown or treated)

Corundum (Aluminum Oxide, Al2O3)

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins

Altered mafic rock or Epidosite

Diabase

Diabase (Dolerite)

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8

Apricot Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Greenschist

Chlorite schist

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions