Mineral, Specifically A Cryptocrystalline Quartz Variety

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Leopard Skin Jasper

Jasper (Silicon Dioxide with impurities), SiO2

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Druzy Quartz

Silicon Dioxide (SiO2)

Yellow Jasper

Chalcedony (SiO2) with Goethite/Iron oxide inclusions

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with impurities

Ruby in Zoisite

Anyolite (combination of Ca2Al3(SiO4)3(OH) and Al2O3:Cr)

Chert

Chert (SiO2)

Jasper

Silicon dioxide (SiO2) with impurities

Chalcedony (Common Opal/Chert variety)

Silicon Dioxide (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Rough Quartz (likely Rose or Amethyst variety)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Chert (varietal known as Jasper or Flint)

Silicon Dioxide (SiO2)

Red Moss Agate (Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Conglomerate

Conglomerate (Clastic sedimentary rock)

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

Amber

Succinite (fossilized tree resin)

Orange Aventurine (Sunstone-style Quartzite)

Silicon Dioxide (SiO2) with Goethite or Hematite inclusions

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)

Agatized Fossil or Chalcedony Nodule

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Chert (Green variety)

Silicon Dioxide (SiO2)

Red Sandstone

Sandstone (principally Quartz with Iron Oxide coating)

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Petrified Wood

Silicified wood (primarily Quartz/Chalcedony, SiO2)

Jet

Lignite (Anthracite-grade compact coal)

Jasper

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

Quartzite

Quartzite (Primary mineral: Silicon Dioxide, SiO2)

Quartzite with inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Yellow Jasper (Chert variant)

Silicon Dioxide (SiO2)

Red Jasper (River Stone)

Jasper (Silicon Dioxide, SiO2 plus iron oxide inclusions)

Orthoceras Fossil in Limestone

Orthoceras regulare (Class Cephalopoda; Order Orthocerida)