Mineral Based Composite

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Quartzite Pebble

Quartzite (mostly SiO2)

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Coquina

Bioclastic Limestone (CaCO3)

Sandstone

Clastic Sedimentary Rock

Shale

Shale (fine-grained clastic sedimentary rock)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, or Chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, or Chrysotile)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Unakite

Unakite (Metasomatized Granite)

Quartz cluster, possibly druzy quartz on matrix

Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Serpentinite

Serpentinite (composed primarily of serpentine group minerals including antigorite, chrysotile, and lizardite)

Serpentinite

Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, Chrysotile)

Greenstone / Serpentinite

Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)

Red Shale

Lutite (primarily composed of clay minerals and iron oxides like hematite, Fe2O3)

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)

Fossil Shark Tooth

Carcharodon carcharias (modern/recent) or similar Lamniform fossil

Bumblebee Jasper (technically Bumblebee Stone)

Calcite, Aragonite, and Realgar/Orpiment mixture (SiO2 + CaCO3 + As2S3/As2S2)

Unakite

Epidotized Granite

Slate

Metamorphic Rock (Fine-grained)

Snowflake Obsidian

Volcanic Glass (spherulitic Obsidian) - SiO2 (with Cristobalite inclusions)

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Agate Geode Slice with Druzy Quartz

Silicon Dioxide (SiO2) - Banded Chalcedony with Quartz

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Sandstone (Stream Pebble)

Arenite (primarily SiO2)

Limonite (Ironstone)

Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)

Limonite (Iron Ore)

Limonite (Hydrated iron oxide - FeO(OH)·nH2O)

Red Sandstone

Arenite (Fe2O3-rich)

Quartz Sand Grain / Micro Crystal

Silicon Dioxide (SiO2)

Bauxite

Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)