Mineral Based Composite

Biotite Schist

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

Basalt with Quartz Veins

Basalt (complex silicate) with Quartz (SiO2) intrusions

Biotite Schist

Biotite Schist

Red Rhyolite Porphyry

Rhyolite (Porphyritic texture)

Aquamarine

Beryl (Be3Al2Si6O18), specifically the blue-green variety

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Granite (specifically Pink or Red Granite)

Phaneritic Felsic Igneous Rock (Granite)

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Igneous Rock)

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite (Weathered)

Plutonic Igneous Rock (Granitic)

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Schist (Micaceous Schist)

Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)

Aquamarine and clear quartz

Aquamarine (Be3Al2Si6O18), Quartz (SiO2)

Basalt

Mafic volcanic rock (formula varies by mineral content: Ca-plagioclase, Pyroxene, Olivine)

Limonitic Scoria (Vesicular Basalt with Iron Staining)

Highly vesicular basalt heavily stained by Limonite [FeO(OH)·nH2O]

Caliche (also known as hardpan, calcrete, kankar)

Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

Garnet-Mica Schist

Garnetiferous Porphyroblastic Schist

Graphite

Graphite (C)

Gneiss (with Mica and Quartz)

Gneissic Metamorphic Rock

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 inclusions)

Diorite

Diorite (Intermediate intrusive igneous rock)

Fossil Coral (Favosites Honeycomb)

Favosites (Genus), Phylum Cnidaria, Class Anthozoa

Basalt with Quartz/Calcite Vein

Amygdaloidal Basalt (matrix) with Mineral Vein filling

Dragon Blood Jasper

Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Granite

Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)

Labradorite

Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Granite

Intrusive Phaneritic Felsic Igneous Rock

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Granite

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

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Lepidolite Bracelet

Lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2) often in Quartz matrix

Biotite Mica

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

Basalt

Vesicular Basalt (Mafic volcanic rock)

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)

Basalt

Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)