Heart-shaped Limestone
Calcium Carbonate (CaCO3)
sedimentary
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia
View all →
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Jasper with Agate and Quartz Inclusions
Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate
sedimentary
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
igneous
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
White Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Yellow calcite (tumbled honey or lemon calcite)
Calcite, calcium carbonate (CaCO₃), likely a yellow/orange calcite variety
mineral
Native Copper
Native Copper (Cu)
mineral
Jasper with Hematite (Red Jasper)
Silicon Dioxide with Iron Oxide (SiO2 and Fe2O3)
sedimentary (physico-chemical precipitate)
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Colorless faceted gemstone, likely cubic zirconia
Cubic zirconia (zirconium dioxide, ZrO₂); visual confirmation is unavailable
gemstone
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Blue Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Red Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Clear quartz crystal point
Quartz (silicon dioxide, SiO₂), likely a polished or cut crystal
mineral
Jasper (Red Jasper with Quartz veins)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Turquoise cabochon jewelry
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Amethyst (Agate/Chalcedony variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Emerald / Fluorite
Beryl (Be3Al2Si6O18) / Fluorite (CaF2)
mineral
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)
fossil
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) matrix with biogenic fragments
fossil
Picture Jasper
Silicon Dioxide (SiO2)
sedimentary
River Pebble (Granite / Sandstone Cobble)
Stream-rounded Rock Pebble
sedimentary
Yellow Quartz (Chalcedony)
Quartz / Chalcedony (Silicon Dioxide, SiO2)
mineral
Wood Beads (Palmwood/Ebony)
Various species for wood, but often refers to woods like Palmwood (e.g., Borassus flabellifer) or Ebony (Diospyros spp.) for their distinctive grain and hardness.
Organic Gem Material (Botanical)
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Red Jasper (possibly Orbicular Jasper)
Silicon Dioxide with inclusions (SiO2)
sedimentary
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Pink Marble
Recrystallized Limestone (Calcium Carbonate, CaCO3)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Fluorite (Rainbow Fluorite Tower)
Fluorite (Calcium Fluoride, CaF2)
mineral
Likely polished leopard-skin jasper or brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone
sedimentary
Tumbled rose quartz
Quartz, silicon dioxide (SiO₂), pink variety
mineral