Dendritic Agate or Moss Agate Nodules (Septarian-like)
Chalcedony with mineral inclusions (SiO2)
Category
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Dendritic Agate or Moss Agate Nodules (Septarian-like)
Chalcedony with mineral inclusions (SiO2)
Mica Schist with Quartz
Mica Schist (principally Muscovite and Biotite with Quartz veins)
Fossilized Tabulate Coral (Honeycomb Coral)
Favosites (Order: Tabulata)
Labradorite
Plagioclase Feldspar (Ca,Na)(Al,Si)4O8
Labradorite
Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8)
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
Moss Agate and Druzy Quartz Carving
Cryptocrystalline Silica (SiO2) with impurities
Citrine
Silicon dioxide (SiO2)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Banded Chert (or River Jasper)
Microcrystalline Quartz (SiO2) with iron oxide impurities
Citrine Quartz Geode
Silicon Dioxide (SiO2) with iron impurities
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
Mica (specimen appears to be Muscovite or Phlogopite)
Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2
Chert (Common Opal/Chalcedony)
Microcrystalline Quartz (SiO2)
Granite
Granite (Felsic Plutonic Rock)
Mica (Lepidolite or Muscovite)
Phyllosilicate mineral (KAl2(AlSi3O10)(OH)2 for Muscovite)
Composite Turquoise or Reconstituted Turquoise with Copper inclusions
CuAl6(PO4)4(OH)8·4H2O (Turquoise) mixed with matrix and copper/bronze flakes
Quartz with Hematite Inclusions
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
Blue Topaz
Topaz [Al2SiO4(F,OH)2]
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
Blue Sapphire
Corundum (Al2O3 with iron and titanium trace elements)
Biotite (Black Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
Plum Blossom Tourmaline
Tourmaline with Lepidolite (Na,Ca)(Li,Mg,Al)3Al6(BO3)3Si6O18(OH)4
Mica Schist
Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)
Basalt with Epidote/Chlorite
Amygdaloidal Basalt (SiO2 with (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)))
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
Tree Agate (also known as Dendritic Agate)
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
Hematite
Hematite (Fe2O3)
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
Fossil Coral
Cnidaria Anthozoa (Fossilized)
Conglomerate
Conglomerative Rudite (SiO2/CaCO3 matrix)
Sandstone
Arenite (composed primarily of SiO2)
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
Lepidolite
K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Fossil Shark Tooth
Elasmobranchii (Lamniformes order likely)