Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Clear Quartz

Silicon Dioxide (SiO2)

Fossilized Bone

Petrified Bone (Fluorapatite / Calcium Phosphate replacement)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Precious Coral (Red Coral)

Corallium rubrum (Calcium Carbonate, CaCO3)

Bloodstone (also known as Heliotrope)

Silicon Dioxide (SiO2) - variety of Chalcedony

Fossiliferous Limestone / Petrifaction

Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)

Petrified Wood

Silicified Wood (primarily Quartz/SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Sandstone

Arenicola (comprising mostly Quartz, SiO2)

Bivalve Fossil in Sedimentary Matrix

Fossiliferous Mudstone (Class: Bivalvia)

Quartz Geode

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Amber

(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Amber

Succinite (C10H16O)

Possible fossilized shell or coral fragment

Indeterminate biogenic carbonate, likely calcite (CaCO₃)

Green Opal

Hydrated amorphous silica (SiO2·nH2O)

Chert (Jasper/Flint)

Microcrystalline Quartz (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Rose Quartz

Silicon Dioxide (SiO2)

Amber (Copal)

Fossilized Tree Resin

Smoky Quartz

SiO2 (Silicon Dioxide)

Quartz

Silicon Dioxide (SiO2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Amber

Succinite / Fossilized Resin (C10H16O)

Fossilized Bone

Permineralized Vertebrate Bone

Jasper

Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)

Dinosaur Fossil Tooth

Vertebrate Fossilized Tooth

Fossilized Bone Fragment

Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)

Amber

Succinite (Resinite)

Vesicular quartz-rich rock, possibly weathered rhyolite or silicified volcanic breccia

Silica-rich volcanic rock; likely microcrystalline quartz (SiO₂) with altered feldspar and iron-oxide staining

Tumbled Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Green Turban Shell (Polished)

Turbo marmoratus (Aragonite/Calcite)

Bivalve Fossil (Fossilized Shell)

Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)

Chert Nodule

Chert (Microcrystalline Silicon Dioxide, SiO2)