Jade (Jadeite or Nephrite)
Jadeite (NaAlSi2O6) or Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Category
Synthetic Or Natural Fiber
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Ironstone Concretion / Goethite Nodules
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granitic Pegmatite with Schorl Tourmaline
Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Granite
Phaneritic Felsic Intrusive Rock (Granite)
Igneous
Turquoise
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Rough Diamond
Diamond (Pure Carbon: C)
mineral
Diamond
Diamond (C)
Mineral
Shale
Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Gold Nugget
Native Gold (Au)
mineral
Tiger's Eye, Hematite, and Black Obsidian Bracelet
SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)
mineral
Sunstone
Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8
Mineral
Amber (Cherry Amber)
Succinite (C10H16O)
Organic Gemstone
Amber (specifically Cherry Amber)
Succinite (with the chemical formula C10H16O)
Organic Gemstone (not a mineral)
Black Tourmaline (Schorl)
NaFe3Al6(BO3)3Si6O18(OH)4
Mineral
Diamond (Uncut Crystal)
Carbon (C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
sedimentary
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
River Quartz (Milky and Smoky mix)
Silicon Dioxide (SiO2)
mineral
![Limonitic Scoria (Vesicular Basalt with Iron Staining) (Highly vesicular basalt heavily stained by Limonite [FeO(OH)·nH2O]) — igneous](https://media.rockidentification.com/2f0eaf7f-d274-4028-af3e-e31436d83d19-thumbnail.jpg)
Limonitic Scoria (Vesicular Basalt with Iron Staining)
Highly vesicular basalt heavily stained by Limonite [FeO(OH)·nH2O]
igneous
Diamond (Green tinted)
Carbon (C) with trace impurities or lattice defects
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Black Opal (Triplet)
Hydrated Silica (SiO2·nH2O)
mineral
Milk Quartz (Tumbled Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2 with iron oxide impurities)
mineral
Amethyst Geodes
Silicon Dioxide (Quartz with Iron impurities), SiO2
mineral
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Red Sandstone
Ferruginous Sandstone
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineral
Opal
Hydrated silica (SiO2 "NH2O)
mineraloid
Turquoise (likely Stabilized or Dyed Howlite/Magnesite)
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Amazonite
Microcline (KAlSi3O8) with trace lead (Pb) impurities
mineral
Amethyst
SiO2 (Silicon Dioxide)
mineral
Native Gold Nugget
Native Gold (Au)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Shale with Plant Fossils / Carbonaceous Shale
Laminated Mudrock (Siliciclastic)
sedimentary
Amethyst
Amethyst (SiO2 - Silicon Dioxide with iron impurities)
mineral