Zebra Jasper
Silicon Dioxide (SiO2) with various inclusions
metamorphic/sedimentary
Category
Sedimentary And Metamorphic
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White calcite (likely tumbled calcite or marble fragment)
Calcite, calcium carbonate (CaCO₃); if the specimen is granular and rock-like, it may be marble, a calcite-rich metamorphic rock
mineral
Quartz
Quartz (SiO₂)
Mineral
Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Gneiss (likely)
Gneiss
Metamorphic
Aventurine (Green Quartz)
Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Quartz
Quartz (SiO2, Silicon Dioxide)
Mineral
Gneiss (with Quartz Vein / Pegmatite Banding)
Metamorphic Gneiss
metamorphic
Garnet
Almandine-Pyrope group, X3Y2(SiO4)3
mineral
Quartz (possibly milky quartz)
Quartz (Silica; SiO₂)
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Rhodonite
Rhodonite (Mn, Fe, Mg, Ca)SiO3
mineral
Mixed river-worn rock and mineral collection
Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble
igneous, sedimentary, metamorphic, mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Cluster
Crystalline Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Magnetite (Charnockite Regional Variation)
Magnetite (Fe3O4)
mineral
Quartz Vein in Matrix (Gneiss/Schist)
Silicon Dioxide (SiO2) in Metamorphic Rock Matrix
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic
Banded Gneiss
Gneiss
Metamorphic
Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)
Quartz (SiO₂)
Mineral
Epidote in Quartz
Quartz with Epidote inclusions (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) inclusions)
Mineral
Garnet (likely Almandine or a blend)
Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.
Mineral
Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Greenschist
Chlorite-actinolite schist
metamorphic
Jasper and Quartz River Cobble
Silicon Dioxide (SiO2) with Hematite inclusions
Sedimentary / Metamorphic
Fuchsite Gneiss or Schist
Muscovite (variety Fuchsite) within Metamorphic Host Rock
metamorphic
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
River Stone (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) based metamorphosed sandstone
metamorphic or sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Aluminum borate silicate)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic