Fossil Shark Tooth
Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite
Category
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
Fossil Shark Tooth
Chondrichthyes (class); likely Lamniformes (order) fossilized in Apatite/Hydroxyapatite
Chert Nodules (with Flint core)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
Blue Topaz
Al2SiO4(F,OH)2 (Aluminum silicate fluoride hydroxide)
Rough Blue Diamond
Carbon (C)
Banded Chert
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide with trace elements (SiO2 + Ti, Fe, or Mn)
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
Bamboo Leaf Jasper
Silicified Siltstone or Jasper (SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Lapis Lazuli
Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)
Chert (and Fossilized Brachiopod shell)
Sedimentary Cryptocrystalline Quartz (SiO2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Limestone with Gastropod Fossil
Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion
Petrified Wood
Silicified Wood (SiO2)
Corundum
Corundum (Aluminium oxide, Al2O3)
Rough Diamond
Native Carbon (C)
Chert Nodules in Limestone
Cryptocrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
Slag Glass
Amorphous Silica / Glass Slag
Chrysocolla
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·n(H2O)
Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
Laterite
Laterite (Ferricrete / Alcrete)
Chrysocolla on Quartz/Rhyolite matrix
Hydrated copper phyllosilicate mineral: (Cu,Al)2H2Si2O5(OH)4·nH2O
Rough Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
Amber
Succinite (Fossilized Tree Resin)
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
Travertine
Calcareous Tufa / Travertine (CaCO3)
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
Pyrite
Iron Sulfide (FeS2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Fossil Shark Tooth
Selachimorpha (Chondrichthyes dental fossil)
Olivine Peridotite
Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)
Petrified Wood
Silicified Wood (primarily SiO2)
Yellow Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Travertine
Travertine (a terrestrial form of Limestone, CaCO3)
Chalcedony (Chert/Flint variety)
Silicon Dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)