Basalt

Larimar

Pectolite (NaCa2Si3O8(OH))

Peridot (Gem-quality Olivine)

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

Peridot

Olivine ((Mg,Fe)2SiO4)

Peridotite

Ultramafic intrusive rock (Peridotite)

Chlorastrolite (Isle Royale Greenstone)

Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O

Heulandite with Stilbite

Heulandite-Ca ((Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O) and Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)

Basalt with Quartz/Feldspar Vein

Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Pebble (Likely Basalt or Siltstone)

Clastic sedimentary rock or mafic volcanic rock

Green Moss Agate / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8

Sapphire (Raw/Rough)

Corundum (Al2O3)

Lake Superior Agate

Banded Chalcedony (SiO2)

Banded Agate (specifically Botswana Agate appearance)

Silicon Dioxide (SiO2) - variety of Chalcedony

Dolerite (Diabase)

Dolerite / Diabase

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Sunstone (Heliolite)

Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)

Diabase (Trap Rock)

Diabase (also known as Dolerite)

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

Labradorite

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

Agate (specifically Botswana or Banded Agate variety)

Chalcedony (Silicon Dioxide, SiO2)

Ruby

Corundum (Al2O3) with Chromium traces

Agate

Agate (Silicon Dioxide - SiO2)

Ruby

Corundum (Al2O3 with Chromium trace elements)

Ruby

Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)

Ruby

Corundum (Al2O3 with Chromium)

Labradorite

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

Greenschist

Greenschist (chlorite-epidote schist)

Sunstone

Heliolite (Oligoclase or Orthoclase Feldspar), (Ca,Na)(Al,Si)4O8

Basalt with Pahoehoe flow texture

Vesicular Basalt (Aphanitic Mafic Igneous Rock)

Peridot

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Amethyst (Tumbled)

Amethyst (Silicon Dioxide with Iron impurities) - SiO2

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst (Geode)

Silicon Dioxide with Iron impurities (SiO2)

Peridotite (with Olivine and Pyroxene)

Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)