mineral

Bumblebee Jasper

Fibrous Calcite with Arsenic and Sulfur inclusions

Hardness: 5 (Mohs scale); Color: Polychromatic with yellow, orange, black, and grey bands; Luster: Vitreous to dull; Crystal structure: Trigonal; Gravity: 2.6-2.7

Hardness: 5 (Mohs scale)
Color: Polychromatic with yellow, orange, black, and grey bands
Luster: Vitreous to dull

Identified June 7, 2026More mineral →

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Physical properties

Hardness: 5 (Mohs scale); Color: Polychromatic with yellow, orange, black, and grey bands; Luster: Vitreous to dull; Crystal structure: Trigonal; Gravity: 2.6-2.7

Formation & geological history

Formed in volcanic fumaroles or hydrothermal vents where volcanic ash, sulfur, and arsenic minerals deposited in cavities. Found primarily in Mount Papandayan, Indonesia.

Uses & applications

Primarily used in jewelry (cabochons), lapidary art, and as a collector's specimen. Due to arsenic content, it is not used in industrial applications.

Geological facts

Despite its name, it is technically an Indonesian volcano carbonate (calcite) rather than a true jasper (silica). The vibrant yellow and orange colors come from realgar and orpiment (arsenic minerals).

Field identification & locations

Identify by its distinctive 'bumblebee' stripes and waxy feel. It is relatively soft and should be handled with care. Common in high-end crystal shops and mineral shows.

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