Synthetic Material (Not A Rock Or Mineral)

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Quartz

Quartz (SiO2)

Jade (Nephrite or Jadeite)

Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt or Porphyritic Andesite

Quartzite

Quartzite (SiO2)

Rhyolitic Tuff (Breccia Type)

Rhyolitic Pyroclastic Rock (Mixed Silicates including Quartz, Feldspar, and Volcanic Glass)

Chert (Jasper/Quartzite variety)

Microcrystalline Silica (SiO2)

Nuummite

Nuummite (Ortho-amphibole rock, primarily Anthophyllite and Gedrite)

Chert (containing Quartz)

Microcrystalline Silica (SiO2)

Quartzite

Quartzite (primarily SiO2)

Sandstone (likely Ferruginous)

Arenite (SiO2 based with Fe2O3/FeO(OH) cement)

Diamond

Diamond (C)

Conglomerate

Conglomerate (clastic sedimentary rock)

Obsidian

Volcanic Glass (Extrusive Igneous Rock, primarily SiO2)

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Shiva Lingam

Cryptocrystalline Quartz (Jasproid/Sandstone) with Iron Oxide (Fe2O3)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

Chert (often called Flint or Jasper depending on color)

Chert (SiO2 - Microcrystalline or Cryptocrystalline Quartz)

Pink Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

Slate

Slate (Low-grade foliated metamorphic rock)

Limestone

Calcium Carbonate (CaCO3)

Red Quartzite River Pebble

Quartzite (SiO2 with iron oxide inclusions)

Pyrite (Fool's Gold) Cube

Iron Sulfide (FeS2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Basalt

Aphanitic Mafic Igneous Rock

Granite Cobble

Granite (Phaneritic Quartz-Feldspar-Mica intrusive rock)

Leopard Skin Jasper

Orbicular Rhyolite (Silicon Dioxide with various impurities)

Pebble (likely Quartzite or Chert)

Clastic Sediment, potentially composed of SiO₂ (Quartz)

Synthetic Convention Badge (Plastic/PVC)

Polyvinyl Chloride (PVC) / Polycarbonate

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Obsidian

Obsidian (principally SiO2)

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Scoria

Vesicular Basalt / Scoriaceous Basalt

Basalt (Water-worn pebble)

Basalt (Aphanitic mafic volcanic rock)

Red Chert (Jasper)

Silicon Dioxide (SiO2)

Granite (tumbled pebble)

Granite (Plutonic Igneous Rock)