sedimentary
Bumblebee Jasper
Carbonate-rich volcanic sediment with arsenic and sulfur inclusions
Hardness: 4-5 (Mohs), Color: Yellow, orange, black, and grey banding, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline)
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Physical properties
Hardness: 4-5 (Mohs), Color: Yellow, orange, black, and grey banding, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline)
Formation & geological history
Formed from volcanic activity and sedimentary deposition in fumaroles. Primarily composed of calcium carbonate (calcite), volcanic ash, sulfur (yellow/orange), and arsenic (black/grey) near sulfur vents in Indonesia.
Uses & applications
Primarily used for lapidary work, jewelry, and as a collector's specimen due to its unique banding.
Geological facts
Despite its name, it is technically not a 'jasper' because it lacks a high silica content; it is actually a calcium carbonate-rich mineral with volcanic inclusions. The 'sting' of this bee is real: it contains toxic arsenic and sulfur.
Field identification & locations
Identified by its distinctive vibrant yellow and black horizontal 'bumblebee' stripes. Found exclusively around Mount Papandayan in West Java, Indonesia. Collectors should handle with care and wash hands after touching raw pieces.
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