Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Category
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Green Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Andesite Porphyry
Andesite Porphyry
Igneous
Amazonite
Amazonite (KAlSi3O8) - a variety of Microcline Feldspar
Mineral
Amethyst Geode/Cluster
Quartz (SiO2) - variety Amethyst
Mineral
Chrysoprase
Chalcedony (cryptocrystalline SiO2 variety)
Mineral
Pyrite (or Fool's Gold)
Pyrite (FeS₂)
Mineral
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Aventurine (likely Green Aventurine)
Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)
Mineral/Metamorphic Rock
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Slate
Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.
sedimentary
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mineral
Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
mineral
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Amethyst
Silicon Dioxide with Iron Impurities (SiO2)
mineral
Green Aventurine
Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions
Mineral
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)
Orbicular Jasper
Silicon Dioxide (SiO2), variety of Chalcedony
Mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Mineral
Limonite
Hydrous Iron Oxide (often Goethite FeO(OH), Lepidocrocite γ-FeO(OH), and other amorphous iron oxyhydroxides)
Mineral
Smoky Quartz
Quartz (SiO₂)
Mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Yellow Jasper
Microcrystalline Quartz with Iron Oxide (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with impurities of Iron or Goethite
sedimentary
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limonite (with Pyrite)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
White Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Moss Agate
SiO2 with impurities (Chalcedony)
Mineral/Gemstone
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
mineral
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Limonite with Quartz (Gossan)
Hydrated iron(III) oxide-hydroxide mixture (FeO(OH)·nH2O) with Silicon Dioxide (SiO2)
Mineral
Anthracite
Anthracite Coal
sedimentary
Blue Goldstone
Aventurine Glass
Man-made glass (often grouped with minerals in lapidary)
Jasper Beach Pebble
Silicon Dioxide (SiO2) - Macro-crystalline Quartz
sedimentary
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Hematite) inclusions
sedimentary