sedimentary
Bumblebee Jasper
Anhydrous Calcium Carbonate with Sulfur and Arsenic (Orpiment/Realgar)
Hardness: 5; Color: Banded yellow, orange, and black; Luster: Waxy to vitreous; Crystal structure: Amorphous/Microcrystalline; Specific gravity: 2.6-2.7
- Hardness
- 5
- Color
- Banded yellow, orange, and black
- Luster
- Waxy to vitreous
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Physical properties
Hardness: 5; Color: Banded yellow, orange, and black; Luster: Waxy to vitreous; Crystal structure: Amorphous/Microcrystalline; Specific gravity: 2.6-2.7
Formation & geological history
Volcanic sedimentary rock formed in fumaroles from the accumulation of volcanic ash, sulfur, and arsenic minerals near volcanos in Indonesia. Formed during the Holocene epoch.
Uses & applications
Primarily used in lapidary arts for cabochons, jewelry, and as a collector's mineral specimen.
Geological facts
Despite the name, it is technically a combination of volcanic ash and carbonate minerals rather than a true jasper (which is silicate-based). It is highly toxic if inhaled or ingested due to its arsenic (orpiment) content.
Field identification & locations
Identified by its distinctive 'bumblebee' stripes of bright yellow and black. Found exclusively at Mount Papandayan in West Java, Indonesia. Collectors should handle it with care and wash hands after use.
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