gemstone

Jasper and Agate Beads (Mahogany Obsidian, Dyed Agate, Turquoise/African Turquoise)

Silicon Dioxide (SiO2) mixture with inclusions / Hydrated Copper Aluminum Phosphate

Hardness 6-7 on the Mohs scale. Colors include reddish-brown with black streaks (Mahogany Obsidian), vibrant teal-blue (Dyed Quartz/Agate), and pale green mottled beads (African Turquoise/Jasper). Vitreous to waxy luster, amorphous to microcrystalline structure.

Identified July 25, 2026More gemstone →

Explore Jasper and Agate Beads (Mahogany Obsidian, Dyed Agate, Turquoise/African Turquoise) in the encyclopedia →

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Physical properties

Formation & geological history

Mahogany Obsidian is an extrusive felsic volcanic glass containing hematite or magnetite inclusions. Agate/Jasper forms in volcanic and sedimentary cavities through silica-rich fluid deposition.

Uses & applications

Primarily used in jewelry making, crafting, beadwork, and decorative accessories.

Geological facts

Mahogany Obsidian gets its characteristic reddish-brown swirls from iron inclusions during the rapid cooling of volcanic lava.

Field identification & locations

Identify by inspecting bead surfaces under light; natural stone beads often feature microscopic surface flaws, variations in pattern, and cool feel to the touch compared to glass or plastic.

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Diamond and Gold Jewelry

Carbon (Diamond) / Au (Gold)

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Ammolite

Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)

mineral

Cubic Zirconia (simulant) or Diamond

ZrO2 (Cubic Zirconia) or C (Diamond)

gemstone

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary

Cubic Zirconia (or possibly Diamond)

Zirconium dioxide (or Carbon)

gemstone

Faceted Gemstone

Unknown transparent mineral, possibly Diamond (C), Cubic Zirconia (ZrO2), Quartz (SiO2), or Glass

gemstone