Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
Category
Mineral Like (Anthropogenic)
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Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Mineral
Gneiss
Gneiss
metamorphic
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Banded Agate (Chert/Chaldcedony)
Silicon Dioxide (SiO₂)
mineral
Fossilized Blastoid (Sea Bud)
Pentremites sp. (Echinodermata, Blastoidea)
fossil
Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Iron-stained Quartz
Silicon Dioxide with Limonite (SiO2 + FeO(OH)·nH2O)
mineral
Flower Agate
Chalcedony (cryptocrystalline Quartz) with Spherulite inclusions; SiO2
mineral
Jasper with Quartz Vein
Silicon Dioxide (SiO2)
sedimentary
Red Sandstone
Arenite with Iron Oxide (Hematite) cement
sedimentary
Banded Gneiss
Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Green Aventurine
Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)
metamorphic
Goethite
Goethite (FeO(OH))
mineral
Fossil / Permineralized Bone
Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)
sedimentary
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH) (Calcium phosphate with Fluorine, Chlorine, or Hydroxyl)
mineral
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Agatized Dinosaur Bone
Permineralized Dinosaur Bone (Silicified/Agatized Bone)
fossil
Pink Dyed Agate
Chalcedony (SiO2) with artificial dyes
mineral
Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related)
Volcanic Glass (70% or more SiO2)
igneous
Quartz (Milky Quartz / Quartz Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Rutile in Quartz (Rutilated Quartz)
SiO2 with TiO2 inclusions
Mineral
Sandstone
Sedimentary Clastic Rock (Quartz arenite)
sedimentary
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Jasper (Chert / Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Tangerine Quartz
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
mineral
Garnet
Garnet group: X3Y2(SiO4)3 (commonly Almandine-Pyrope series)
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
River Cobble (Quartz-rich Sandstone)
Arenite with iron oxide staining
sedimentary
Limonite (Ironstone Concretion)
Limonite (FeO(OH)·nH2O)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Malachite
Copper carbonate hydroxide, Cu2CO3(OH)2
mineral
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
sedimentary
Ferruginous Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Greenstone / Epidosite
Epidosite (primary minerals: Epidote and Quartz)
metamorphic
Limonite
Limonite (Hydrous iron oxides, FeO(OH)·nH2O)
mineral
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary