Rough Emerald Crystals
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Category
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Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Fire Quartz (Hematoid Quartz)
Quartz with Hematite inclusions (SiO2 + Fe2O3)
mineral
White Howlite
Howlite (Hydrated calcium borosilicate, Ca2B5SiO9(OH)5)
mineral
Limonite (Yellow Ochre)
FeO(OH)·nH2O (Hydrous iron(III) oxide-hydroxide mixture)
Mineral (Iron Ore)
Wonderstone (Liesegang Sandstone)
Silicified Sandstone with Liesegang Rings (SiO2 + FeO(OH))
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Rough Garnet in Matrix
Almandine Garnet (Fe3Al2Si3O12)
mineral
Polished/tumbled unakite (probable)
Unakite; epidote + pink potassium feldspar + quartz
metamorphic
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Limonite (Limonitic Sandstone)
Hydrated Iron(III) Oxide-Hydroxide ($FeO(OH)·nH_2O$)
sedimentary
Limonite with Goethite
Iron Hydroxide Mixture (FeO(OH)·nH2O)
mineral
Green Fluorite (Beaded)
Fluorite (Calcium Fluoride, CaF2)
mineral
Dalmatian Stone
Dalmatian Jasper / Feldspathic Igneous Rock
igneous
Chert or flint fragment
Microcrystalline quartz (SiO₂), possibly iron-stained chert
sedimentary
Limonite Ironstone
Goethite-Limonite concretion / Iron oxide
sedimentary
Limonite
FeO(OH)·nH2O
mineral
Limonite with Ironstone
Limonite (hydrated iron(III) oxide-hydroxides), FeO(OH)·nH2O
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Limonite
Limonite (Hydrated iron oxide mixture, FeO(OH)·nH2O)
mineral
Limonite Nugget
Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Limonite
Limonite (Hydrous iron oxides, predominantly Goethite FeO(OH)·nH2O)
mineral
Limonite
Limonite (FeO(OH)·nH2O)
mineral
Limonite
FeO(OH)·nH2O
mineral
Tumbled smoky quartz (probable)
Quartz, silicon dioxide (SiO₂), smoky variety
mineral
Galena (likely)
Galena, lead sulfide (PbS)
mineral
Blue magnesite beads
Magnesite (MgCO₃), likely stabilized or dyed; brown veining may reflect matrix or iron oxides
mineral
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Amethyst
Quartz (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sodalite
Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)
mineral
Quartz-rich pegmatite with drusy quartz
Quartz (SiO₂) in a granitic pegmatite, likely with feldspar and mica inclusions
igneous
Tumbled pale green aventurine (probable)
Quartz, SiO₂, with dispersed fuchsite or other green inclusions
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Amazonite
Microcline feldspar (KAlSi₃O₈), green variety
mineral