Mineral Based Composite

Basalt

Basalt (composition of plagioclase, pyroxene, and olivine)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Muscovite

Muscovite (KAl2(AlSi3O10)(OH)2)

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Dzi Bead (Agate)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Bismuth Crystal

Bismuth (Bi)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Vesicular Basalt (Iron-rich)

Scoriaceous Basalt / Oxidized Vesicular Basalt

Basalt with Quartz Vein and Weathering Crust

Amygdaloidal or Porphyritic Basalt

Andesite

Intermediate Volcanic Rock (Andesite)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Basalt (Crushed Stone Aggregate)

Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Biotite on Matrix

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

Granite

Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Orbicular Jasper (Ocean Jasper variant)

Silicon Dioxide (SiO2) with iron oxide inclusions

Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Dendritic Agate (also known as Dendritic Siltstone or Mudstone)

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

Biotite Mica in Host Rock

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

Moss Agate

Chalcedony (Silicon Dioxide / SiO2)

Labradorite

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

Biotite Schist with Garnet

Garnet-Biotite Schist

Granite (Micro-specimen)

Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide - SiO2)

Bull Quartz (White Quartz)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (Fe-bearing Clastic Sedimentary Rock)

Fuchsite (Green Muscovite in Quartz)

K(Al,Cr)2(AlSi3O10)(OH)2 - Chromium-rich Muscovite

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Kambaba Jasper

Stromatolite / Fossilized Algae (Rhyolitic structure)

Epidote

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

Epidote

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

Quartz with Mica inclusions (likely Schist or Gneiss host)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

Granodiorite

Phaneritic Granodiorite