Mineral Based Composite

Epidote

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

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Fossilized Coral (Petoskey-like or Favosites)

Anthozoa (Fossilized Coral)

Lepidolite

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

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

Quartz-veined Jasper

Microcrystalline quartz (SiO2) with quartz veins

Sandstone

Arenite (lithic or quartz sandstone)

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)

Dendritic Agate (also known as Dendritic Siltstone or Mudstone)

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

Biotite Schist with Garnet

Garnet-Biotite Schist

Fragmented Sedimentary Pebble

Clastic Sedimentary Specimen

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Granite

Phaneritic Felsic Intrusive Rock

Chert (or Limestone)

Sedimentary Cryptocrystalline Quartz (SiO2) or Calcium Carbonate (CaCO3)

Epidote with Quartz Vein

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

Banded River Stone (Greywacke or Siltstone subtype)

Sedimentary Banded Siltstone

Iridescent schist or phyllite

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

Biotite on Matrix

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

K2 Jasper

Azurite in Granite

Sandstone (Quartzose)

Arenite (primarily SiO2)

Granodiorite (Water-worn Pebble)

Granodiorite

Greenstone

Metabasalt / Chlorite-Epidote Schist

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions

Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)

Pink Granite Pebble

Granite (Phaneritic igneous rock)