Metamorphic (Modified)

Tumbled green aventurine (probable)

Quartzite composed chiefly of quartz (SiO₂), with green fuchsite or other mica inclusions

Magnetite-rich ironstone (probable magnetite ore)

Magnetite, Fe₃O₄, likely in a fine-grained ironstone matrix

Pyrite

Iron Pyrite (FeS2)

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃), commonly mixed with quartz and manganese oxides

Ruby in Zoisite

Anyolite

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Rhodonite

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

Epidosite (Unakite-related)

Epidosite (composed primarily of Epidote and Quartz)

Greenstone / altered mafic rock

Likely chlorite–epidote–actinolite schist or altered basalt (greenstone); exact identification requires thin-section or chemical testing.

Tumbled quartz-rich pebble, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if metamorphically recrystallized

Quartz-rich rock fragment

Likely milky quartz (SiO₂), possibly a pale quartzite fragment

Epidote

Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))

Quartzite (iron-stained, possibly metaconglomeratic)

Quartzite; predominantly recrystallized quartz (SiO₂) with iron-oxide accessory minerals

Lapis Lazuli

Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2 (Actinolite-Tremolite series)

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Epidote Water-Worn Pebble

Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Phyllite

Phyllite (Intermediate grade metamorphic rock)

Likely amphibolite (hornblende gneiss or mafic metamorphic rock)

Amphibolite, chiefly hornblende amphibole and plagioclase feldspar, with possible quartz, biotite, or epidote

Garnet in Matrix

Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)

Sandstone or Quartzite

Arenite (if sedimentary) / Quartzite (if metamorphic)

Slate

Slate; fine-grained metamorphosed shale, commonly composed of quartz, illite/muscovite, and chlorite

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)

Clear Quartz (Faceted)

Silicon dioxide (SiO2)

Jasper

SiO2

Quartz pebble

SiO2, Quartz

Quartz

Silicon Dioxide (SiO2)

Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Apatite

Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)

Moonstone

Orthoclase (KAlSi3O8)

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.

Epidote with quartz/feldspar

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

Quartzite Pebble

Quartzite (SiO2)

Emerald (green gemstone in a jewelry setting)

Beryl, Be₃Al₂(SiO₃)₆; green color commonly from chromium and/or vanadium

Pale greenish quartz-bearing rock, possibly serpentine or altered feldspar

Tentatively serpentinite-related rock (serpentine-group minerals) or altered granitic material; identification is uncertain from the photograph

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃)

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Quartz-rich altered rock, possibly quartz vein with mica

Microcrystalline to coarse quartz (SiO₂) with probable muscovite/biotite mica and iron-oxide staining

Sunstone and Garnet

Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8) and Almandine Garnet (Fe3Al2(SiO4)3)

Tumbled green aventurine

Quartz (SiO₂), commonly containing fuchsite mica inclusions