sedimentary

Bumble Bee Jasper

Calcite and Volcanic Ash Mixture

AI-generated identification · may be incorrect

Hardness: 3-4 (Mohs scale); Color: Yellow, orange, black, and white banded patterns; Luster: Waxy to dull; Crystal Structure: Trigonal (Calcite-based); Specific Gravity: 2.6-2.8

Hardness: 3-4 (Mohs scale)
Color: Yellow, orange, black, and white banded patterns
Luster: Waxy to dull

Identified June 7, 2026More sedimentary →

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Physical properties

Hardness: 3-4 (Mohs scale); Color: Yellow, orange, black, and white banded patterns; Luster: Waxy to dull; Crystal Structure: Trigonal (Calcite-based); Specific Gravity: 2.6-2.8

Formation & geological history

Formed in volcanic fumaroles where volcanic ash, sulfur, and carbonate minerals seeped into cracks. Most deposits are localized and relatively young in geological terms.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons), and as a collector's specimen due to its striking patterns.

Geological facts

Despite its name, it is technically an Indonesian carbonite rock, not a true jasper. It contains significant amounts of sulfur (yellow) and arsenic (orpiment), so it requires careful handling.

Field identification & locations

Identify by its distinct 'bumble bee' banding and proximity to volcanic vents. It is almost exclusively found at Mount Papandayan in West Java, Indonesia.