Mineraloid Like Synthetic Material

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Marble

Recrystallized Calcite (CaCO3)

Quartzite

Quartzite (SiO2)

Basalt

Basalt (Fine-grained extrusive igneous rock)

Pink Quartzite

Quartzite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sodalite

Sodalite: Na8(Al6Si6O24)Cl2

Basalt (Vesicular)

Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Chalcedony (Moonstone variant or White Agate)

Silicon Dioxide (SiO₂)

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Siltstone

Siltstone (primarily SiO2 with Al2O3 and Fe2O3)

Chiastolite (Andalusite)

Al2SiO5

Jasper or Agate-bearing Chert

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Diamond

Diamond (C)

Chert (Jasper variety)

Chert (SiO2)

Coquina or Fossilized Shell Aggregate

Calcareous bioclastic sedimentary rock (CaCO3)

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt

Quartzite

Quartzite (SiO2)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide impurities

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Quartzite (Orthoquartzite)

Quartzite (SiO2)

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various additives

Basalt with Peridotite Inclusion

Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith

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.

Pyrite

Iron Disulfide (FeS2)

Coquina

Coquina (Bioclastic Limestone)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Glauconitic Sandstone (Greensand pebble)

Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Banded Agate (specifically Sardonyx or Red Agate)

Silicon Dioxide (SiO2)

Chert (Grey-Green Flint)

Microcrystalline silicon dioxide (SiO2)

Mica Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

Chert (variant Flint/Jasper)

Microcrystalline Opaline Silica (SiO2)

Chert (Field Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished Chert (Flint)

Silicon Dioxide (SiO2)

Chert (varietal: Jasper or Flint)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (Arrowhead/Tool variety)

Microcrystalline Quartz (SiO2)