Quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂), with minor dark mica or amphibole and possible feldspar
metamorphic
Category
Organic Gem Material (Botanical)
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Tumbled jadeite or nephrite jade bead bracelet
Jade: jadeite (NaAlSi₂O₆) or nephrite, a tremolite–actinolite amphibole aggregate
gemstone
Petrified Wood (Silicified Fossil)
Silicified Wood (SiO2)
sedimentary
Sunstone
Oligoclase (a variety of Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8
mineral
Rough Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Polished black-and-golden tourmaline
Schorl–dravite tourmaline, commonly represented by black schorl over brown dravite
mineral
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Milky quartz in weathered host rock
Quartz, silicon dioxide (SiO₂), likely occurring in altered igneous or metamorphic matrix
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
gemstone
Sandstone (with Moss)
Quartz Arenite / Sandstone
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Tufa Rock and Tumbled Gemstones
Calcareous Tufa (Calcium Carbonate, CaCO3)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
Sedimentary/Mineral
Pyrite Geode
Iron Disulfide (FeS2)
mineral
Peridot gemstone pendant
Olivine, gem-quality forsteritic olivine (approximately (Mg,Fe)₂SiO₄)
gemstone
Calcite-rich limestone, possibly fossiliferous
Limestone composed mainly of calcite (CaCO₃), potentially containing a fragmentary fossil or calcite-filled structure
sedimentary
Quartz-rich breccia or quartzite with iron-oxide veining
Microcrystalline to granular SiO₂ (quartz), with hematite/goethite and minor feldspar or mica
metamorphic
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Chert (Cryptocrystalline microcrystalline Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
sedimentary
Milky quartz vein rock
Quartz, silicon dioxide (SiO₂), likely with iron-oxide staining and minor mica or sulfide minerals
mineral
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Common Opal)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper Agate
Silicon dioxide (SiO2)
mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Calcite-rich limestone (possibly fossiliferous limestone)
Calcite, CaCO₃, in a limestone matrix
sedimentary
Clear Quartz crystals on a Matrix base (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Iron-oxide-bearing rock fragment
Likely limonite/goethite with quartz or host-rock inclusions; exact identification requires testing
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
gemstone
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Gneiss
Felsic banded gneiss, chiefly quartz–feldspar–mica
metamorphic
Quartz-rich vein rock, likely milky quartz in schist
Milky quartz (SiO₂) with probable mica schist/greenschist host rock
metamorphic