Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Category
Organic Gem Material (Botanical)
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Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Cut faceted gemstone, possibly diamond or quartz
Uncertain from the blurred image; diamond is crystalline carbon (C), while quartz is silicon dioxide (SiO₂)
gemstone
Coquina / Limonite-stained Limestone
Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)
sedimentary
Rough Diamond
Diamond (C)
mineral
Tumbled sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
mineral
Polished serpentine (likely bowenite/antigorite)
Serpentine-group minerals, chiefly antigorite or lizardite: Mg₃Si₂O₅(OH)₄
metamorphic
Black tourmaline (likely schorl), polished
Schorl tourmaline — NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
White Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Raw aquamarine-bearing beryl
Beryl, Be₃Al₂Si₆O₁₈; blue-green color is caused mainly by iron impurities
mineral
Weathered granite pebble
Granite, chiefly quartz (SiO₂), feldspar, and mica/amphibole
igneous
Iron-stained quartz-rich rock (likely quartzite or quartz vein material)
Quartz (SiO₂), commonly with limonite/goethite iron oxides; possible quartzite matrix
metamorphic
Polished brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and possibly chlorite inclusions
mineral
Blue-green turquoise (probable)
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Rough Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
gemstone
Weathered iron-rich rock, possibly meteorite
Uncertain; likely goethite/hematite-rich material, with meteorite possibility
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
sedimentary
Shungite
Non-crystalline carbon (allotrope of carbon)
metamorphic
Blue apatite specimen
Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber (Green variation)
Succinite
fossil
Greenstone, likely serpentinite
Serpentinite; predominantly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), possibly with chlorite, talc, magnetite, or antigorite
metamorphic
Sapphire (Rough)
Corundum (Al2O3)
mineral
Basalt
Basalt
igneous
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Ruby (Raw/Rough)
Corundum (Al2O3 with Chromium trace)
mineral
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Nephrite Jade (River Bed Pebble)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Tumbled goldstone-like quartz pebble
Likely iron-stained quartz or jasper; exact identification requires testing
mineral
Greenstone / altered basalt fragment
Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing
igneous
Faceted colorless gemstone, likely diamond
Diamond (crystalline carbon, C)
gemstone
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
fossil