Mahogany Obsidian Slab – 29 Grams – Polished Volcanic Glass for Collectors

This Mahogany Obsidian specimen weighs 29 grams and features rich swirls of reddish-brown against a deep black matrix. Its naturally polished sheen and rugged edges make it a striking piece for collectors or lapidary artists. Sourced from ancient volcanic flows, this slab captures the raw energy of Earth’s fiery origins.

• Size Dimensions & Weight: Approx. 29 grams; irregular slab shape

• Condition: Natural slab with one broken edge; polished face

• Origin: Likely USA or Mexico (common sources)

• Chemical Family: Silicate

• Composition: Volcanic glass with iron inclusions

• Color: Black with reddish-brown banding

• Formation: Rapidly cooled lava with high iron content

• Hardness: 5–5.5 on Mohs scale

• Nickname: “Volcanic Ironwood”

Note: Some photographs were taken while the specimen was wet to enhance its natural colors.