Anthropogenic Specimen (Man Made Material)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Red Sandstone

Arenite (ferruginous sandstone)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (and Flint)

Cryptocrystalline Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Chert (Chert / Flint)

Silicon Dioxide (SiO2)

Diamond

Native Carbon (C)

Pumice

Pumice (volcanic glass with vesicular texture)

Chert (specifically Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified wood (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)

Granite

Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Lapis Lazuli

Complex metamorphic rock consisting mainly of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Anthracite Coal

Anthracite

Petrified Wood

Silicified Wood (SiO2)

Pyrite

Iron Pyrite (FeS₂)

Quartzite

Quartzite (primarily SiO2)

Basalt

Extrusive Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Olivine (likely Peridot variety)

Olivine Mineral Group (specifically Forsterite-Fayalite solid solution series); Chemical formula: (Mg,Fe)2SiO4

Limestone

Calcium Carbonate (CaCO3)

Mica Schist

Mica Schist (predominantly composed of Muscovite or Biotite silicates)

Anthracite Coal

Anthracite (Carbon Content: 86%–98%)

Citrine Quartz

Citrine (Silicon Dioxide - SiO2)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Quartz (Druzy) in host rock

SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

Granite

Granite (Felsic intrusive igneous rock)

Cockle Shell (Fossil or Recent)

Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)

Chert (Nodule)

Silicon Dioxide (SiO2)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Banded Chert

Cryptocrystalline Quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Apatite

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