igneous
Bumblebee Jasper
Calcite with Arsenic and Manganese oxides (technically a volcanic rock)
Hardness: 4.0-5.0 (Mohs scale), Color: Yellow, orange, black, and gray banding, Luster: Vitreous to dull, Crystal Structure: Trigonal (major component calcite), Cleavage: Perfect in three directions, Specific Gravity: 2.6-2.7
- Hardness
- 4
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Physical properties
Hardness: 4.0-5.0 (Mohs scale), Color: Yellow, orange, black, and gray banding, Luster: Vitreous to dull, Crystal Structure: Trigonal (major component calcite), Cleavage: Perfect in three directions, Specific Gravity: 2.6-2.7
Formation & geological history
Formed from volcanic activity in the fumaroles of Mount Papandayan in West Java, Indonesia. It is a sedimentary-like deposit of volcanic ash, sulfur, arsenic, and calcium carbonate.
Uses & applications
Primarily used in jewelry as cabochons, pendants, and beads, as well as for lapidary art and metaphysical collecting.
Geological facts
Bumblebee Jasper is not a true Jasper because it lacks high silica content; it is actually a mixture of volcanic lava and sediment. Despite its beauty, it contains arsenic and sulfur, so hands should be washed after handling raw specimens.
Field identification & locations
Identify by its distinct bright 'bumblebee' yellow and black banding. Found exclusively on the island of Java, Indonesia. Collectors look for sharp, high-contrast banding and 'eye' patterns.
