Mineral Based Human Made Alloy

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Epidote

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Fossilized Coral (Petoskey-like or Favosites)

Anthozoa (Fossilized Coral)

Biotite Mica

K(Mg, Fe)3(AlSi3O10)(F, OH)2

Labradorite (Raw)

(Ca,Na)(Al,Si)4O8

Biotite in Host Matrix

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Lepidolite

Lepidolite - K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Blue Topaz

Al2SiO4(F,OH)2 (Fluorine-bearing aluminum silicate)

Ferruginous Quartz

Silicon Dioxide with Hematite/Limonite impurities (SiO2 + Fe2O3)

Moss Agate

Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Moss Agate

Chalcedony (Silicon Dioxide / SiO2)

Tree Agate

Silicon Dioxide (SiO2) with inclusions of manganese and iron oxides

Labradorite

Labradorite ((Ca,Na)(Al,Si)4O8)

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Sandstone)

Quartz-veined Jasper

Microcrystalline quartz (SiO2) with quartz veins

Citrine

Silicon dioxide (SiO2)

Citrine (Heat-treated)

Silicon Dioxide (SiO2)

Labradorite (Feldspar)

Labradorite, (Ca,Na)(Al,Si)4O8

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with iron silicate and iron oxide inclusions

Bloodstone (Heliotrope)

Silicon dioxide (SiO2) with iron oxide inclusions

Dendritic Agate (also known as Dendritic Siltstone or Mudstone)

Silicon Dioxide with Manganese/Iron Oxide inclusions (SiO2 + MnO2)

Sandstone

Arenite (lithic or quartz sandstone)

Fragmented Sedimentary Pebble

Clastic Sedimentary Specimen

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Banded River Stone (Greywacke or Siltstone subtype)

Sedimentary Banded Siltstone

Banded Agate (Dyed)

Silicon Dioxide (SiO2) with impurities

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Banded Agate (specifically Mexican Lace Agate variety appearance)

Silicon Dioxide (SiO2 / Chalcedony)

Biotite on Matrix

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Likely basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, clinopyroxene, and often olivine

Weathered basalt (likely vesicular basalt)

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine

Granite

Coarse-grained felsic intrusive igneous rock; primarily quartz, alkali feldspar, plagioclase, and biotite/hornblende

Epidote with Quartz Vein

Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))

Iridescent schist or phyllite

Micaceous quartz-rich schist/phyllite, likely containing muscovite or chlorite

Sandstone (Quartzose)

Arenite (primarily SiO2)

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

K2 Jasper

Azurite in Granite