Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Category
Man Made (Synthetic Rock)
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Slate
Metamorphic pelitic rock
metamorphic
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
igneous
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Coquina and Oyster Fossil Rock
Coquina limestone (Calcium Carbonate, CaCO3) containing fossilized Crassostrea / bivalve shells
fossil
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Chert (varietal Flint)
Microcrystalline quartz (SiO2)
sedimentary
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
sedimentary
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Chert (River Siltstone/Quartzite type)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Fossilized Coral (Petoskey Stone / Hexagonaria)
Hexagonaria percarinata / Rugosa coral (CaCO3)
fossil
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Diorite (River Pebble)
Intermediate plutonic igneous rock
igneous
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Cubic Zirconia (Set in Jewelry)
Zirconium Dioxide (ZrO2)
gemstone
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Colorless faceted gemstone (most likely synthetic cubic zirconia)
Cubic zirconia, ZrO₂ (likely synthetic); natural alternatives include quartz or diamond
gemstone
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)
Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)
metamorphic
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Diamond (Faceted Gemstone)
Native Carbon (C)
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Bismuth Crystal
Bismuth (element symbol Bi, atomic number 83)
mineral
Red Agate (Carnelian)
Silicon Dioxide (SiO2)
gemstone
Hematite
Iron(III) oxide (Fe2O3)
mineral
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Grey Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Hematite
Iron(III) oxide, Fe2O3
mineral
Diamond (or Cut Gemstone / Cubic Zirconia)
Carbon (C)
gemstone
Dyed Purple Agate Sliced Tablet
Silicon Dioxide (SiO2), variety Chalcedony
gemstone
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
mineral
Ruby (varietal of Corundum)
Corundum (Al2O3:Cr)
gemstone