mineral

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

AI-generated identification · may be incorrect

Hardness: 3-5 (Mohs scale), Color: Banded yellow, orange, black, and grey, Luster: Waxy to sub-vitreous, Crystal Structure: Trigonal/Orthorhombic (variable mix), Cleavage: None/Indistinct, Specific Gravity: 2.6-2.7

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed in fumeroles or volcanic vents where sedimentary layers were infused by hydrothermal fluids containing sulfur, arsenic, and calcium. Specifically found in Mount Papandayan, Indonesia; formed during the Pleistocene to Holocene epoch.

Uses & applications

Used primarily in lapidary arts for jewelry (cabochons), interior decoration, and as a popular collector specimen for its vibrant colors.

Geological facts

Despite its name, it is technically a calcium-carbonate rock (calcite/aragonite) rather than a true jasper (silica). The vibrant yellow and orange colors are caused by sulfur and traces of poisonous arsenic (realgar and orpiment).

Field identification & locations

Identify by its distinct high-contrast bands of bright yellow and black, often with small fluid-filled cavities (vugs). It is almost exclusively mined on the island of Java, Indonesia. Collectors should handle raw specimens with care due to mineral toxicity; washing hands after touching is recommended.