Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
metamorphic
Category
Sedimentary Or Metamorphic Derived
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Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Unakite
Unakite (metamorphosed granite)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Unakite
Epidotized Granite
metamorphic
Mica Schist
Schist (Muscovite/Biotite Schist)
metamorphic
Schist
Lepidoblastic Mica Schist
metamorphic
Green Aventurine
Silicon Dioxide (Quartz variety) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Quartz (Druzy) on Matrix
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Unakite
Altered Granite (Granitic Metamorphic Rock)
metamorphic
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Quartzite with Hematite staining
Quartzite (SiO2) with iron oxide inclusions (Fe2O3)
metamorphic
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Tumbled quartz-rich pebble, possibly quartzite
Quartzite (mostly SiO₂), or quartz-bearing chert; exact identification requires testing
metamorphic
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Foliated slate or phyllite
Fine-grained metamorphosed mudstone; typically quartz, mica, chlorite, and clay-derived minerals
metamorphic
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Unakite
Altered Granite (Granitic Metamorphic Rock)
metamorphic
Unakite
Altered Granite (Epidote, Orthoclase Feldspar, Quartz)
metamorphic
Unakite
Unakite (metamorphosed granitic rock)
metamorphic
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Marble
Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.
Metamorphic Rock
Serpentinized ultramafic rock (likely serpentinite)
Serpentinite; chiefly serpentine-group minerals (chrysotile, lizardite, antigorite), with olivine/pyroxene relics and possible magnetite
metamorphic
Serpentinized ultramafic rock (likely serpentinite)
Serpentinite; chiefly serpentine-group minerals, with possible magnetite, olivine, pyroxene, and talc
metamorphic
Flint (or Chert)
Microcrystalline quartz (SiO2)
sedimentary
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Carnelian
Chalcedony (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with Iron inclusions
mineral
Red Jasper (Siltstone variant)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Polished malachite
Malachite, Cu₂CO₃(OH)₂
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Green Aventurine
Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral