gemstone
Bumblebee Jasper
Fibrous Calcite with Arsenic and Sulfur Inclusions
Hardness of 5 on the Mohs scale, vibrant yellow, orange, and black bands or mottled patterns, vitreous to earthy luster, microcrystalline structure, specific gravity around 2.6-2.7.
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Physical properties
Hardness of 5 on the Mohs scale, vibrant yellow, orange, and black bands or mottled patterns, vitreous to earthy luster, microcrystalline structure, specific gravity around 2.6-2.7.
Formation & geological history
Formed in geothermal active environments, specifically around fumaroles and hot springs in volcanic regions. Found primarily at Mount Papandayan in West Java, Indonesia. Geological age is relatively young, associated with recent volcanic activity.
Uses & applications
Used primarily in lapidary arts to create cabochons for jewelry, as well as being a popular and colorful specimen for mineral collectors.
Geological facts
Despite being commonly called 'Jasper', it is not actually a microcrystalline quartz. The striking yellow and orange colors come from sulfur and arsenic-bearing minerals like realgar and orpiment, which means raw specimens should be handled with care.
Field identification & locations
Easily identified in hand specimens by its distinct, bold yellow and black bumblebee-like color patterns. Found exclusively in Indonesia associated with volcanic vents.
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