Polished blue stone, likely sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue-dyed jasper or lapis lazuli
mineral
Category
Sedimentary (If Limestone) Or Metamorphic (If Marble)
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Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, with varying amounts of Calcite, Pyrite, and Sodalite).
Mineral
Granite
Granite (Felsic Plutonic Rock / SiO2 + Al2O3)
igneous
Ruby / Red Tourmaline
Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)
mineral
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Star Ruby
Corundum (Al2O3 with chromium and rutile inclusions)
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Ruby in Matrix
Corundum (Al2O3)
mineral
Quartzite
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Quartzite with Iron Inclusions
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite River Stone
Metamorphic Quartzite (primarily SiO2)
metamorphic
Tumbled pink calcite (probable)
Calcite, calcium carbonate (CaCO₃), likely manganocalcite variety
mineral
Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
gemstone
Ruby (Corundum)
Aluminium oxide (Al2O3) with Chromium traces
mineral
Sapphire (Rough Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Serpentine
Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Pink Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble (River Rock)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Fuchsite Gneiss (Green Quartzite)
Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2 with Cr replacements)
metamorphic
Calcite
Calcite (CaCO₃), likely massive crystalline calcite
mineral
Polished serpentine pebble
Serpentinite, chiefly serpentine-group minerals (antigorite/lizardite; approximate formula Mg3Si2O5(OH)4)
metamorphic
Blue Apatite
Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)
mineral
Serpentine
Serpentine Group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Quartzite with Chlorite
Metamorphic Quartzite (SiO2) with phyllosilicates
metamorphic
White quartz-rich pebble, likely quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with minor feldspar or mica
metamorphic
Banded Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Siderite Concretion
Ironstone (Siderite) Concretion, FeCO3
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
mineral
Quartz-rich metamorphic rock, likely quartzite
Quartzite (mostly crystalline SiO₂), possibly quartz-rich schist or vein quartz
metamorphic
Yellow Quartzite
Quartzite (SiO2)
metamorphic