Metamorphic Or Igneous Alteration

Greenstone (Greenschist facies)

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

Tiger's Eye

SiO2

Dumortierite Quartz

Dumortierite in Quartz (Al6O3(BO3)(SiO4)3)

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Red gemstone ring, likely synthetic ruby or red glass

Unidentified red faceted stone; ruby is corundum (Al₂O₃)

Quartz Pebble

Crystalline Silica (SiO2)

Red/pink granite or granitic gneiss

Felsic granitoid, chiefly quartz, potassium feldspar, plagioclase, and biotite; exact identification is uncertain from the image

Biotite-rich granite or granitic gneiss

Coarse-grained quartz–feldspar–biotite rock; likely granite, possibly weakly foliated gneiss

Granite cobble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Auriferous Quartz or Pyritic Ore

Iron Pyrite (FeS2) or Native Gold (Au) in Matrix

Honey-colored quartz (likely citrine or iron-stained quartz)

Quartz, silicon dioxide (SiO₂); possibly iron-stained or heat-treated citrine

Likely black diamond or dark faceted gemstone ring

Uncertain from the photograph; possibly carbon (diamond) or black spinel, set in metal

Greenstone

Greenschist (metamorphosed mafic igneous rock)

Epidote

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

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Polished malachite

Malachite, Cu₂CO₃(OH)₂

Green-speckled igneous rock, likely epidote-bearing basalt or serpentinite

Tentatively epidote-bearing basalt (compositionally uncertain from the image)

Unidentified dark, foliated metamorphic rock

Likely biotite schist or hornblende-bearing gneiss; exact identification requires testing

Quartzite with Epidote/Chlorite Inclusion

Metamorphic Quartzite (SiO2 with accessory silicate minerals)

Faceted yellow gemstone ring

Likely yellow sapphire (corundum), but exact identification requires testing; alternatives include citrine, chrysoberyl, or treated diamond.

Iron-stained quartz-rich rock, likely granite or pegmatite fragment

Weathered granite/pegmatite; mainly quartz (SiO₂) with feldspar and iron-oxide staining

Weathered gray-green basaltic rock

Basalt, likely altered to low-grade greenschist/amphibolite facies

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Nephrite Jade

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

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Likely weathered blue-gray basalt

Basalt, a fine-grained mafic volcanic rock; commonly plagioclase + pyroxene ± olivine and iron oxides

Blue Quartz (or Blue Aventurine)

Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Rhodonite

Rhodonite, (Mn,Fe,Mg,Ca)SiO₃

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Nephrite Jade

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

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Serpentine

Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4

Fuchsite

Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Polished greenstone (likely serpentine or nephrite-like material)

Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite (actinolite–tremolite amphibole)

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Dumortierite Quartz

Dumortierite (Al7BCuO15)