mineral
Polished bumblebee jasper
Calcite–orpiment/realgar-rich silicified volcanic rock (commercially called bumblebee jasper)
AI-generated identification · may be incorrectTypically yellow-orange, black, and gray-brown banding with a waxy to glassy polish; hardness is variable, about Mohs 3–6, with no consistent crystal structure or cleavage because it is a mixture of minerals. Specific gravity commonly ranges about 2.5–2.8.
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Physical properties
Typically yellow-orange, black, and gray-brown banding with a waxy to glassy polish; hardness is variable, about Mohs 3–6, with no consistent crystal structure or cleavage because it is a mixture of minerals. Specific gravity commonly ranges about 2.5–2.8.
Formation & geological history
Most material comes from volcanic fumarolic or hydrothermal environments, especially Java, Indonesia, where calcite and sulfide minerals replace or fill cavities in volcanic rock. The geological age is generally young, associated with Quaternary volcanism.
Uses & applications
Used as a lapidary stone for cabochons, tumbled stones, carvings, and decorative objects; it has limited industrial value. Orpiment/realgar-bearing pieces should not be used for elixirs or prolonged skin contact because arsenic sulfides can be toxic.
Geological facts
Its vivid “bumblebee” pattern is produced by yellow calcite and sulfur- or arsenic-bearing minerals contrasting with dark matrix. The trade name “jasper” is informal and does not necessarily indicate true quartz-rich jasper.
Field identification & locations
Identify it by vivid yellow-orange/black volcanic pattern, low-to-moderate hardness, and strong polish; avoid scratching or grinding unknown material and wash hands after handling. Commonly sold from Indonesia through lapidary and mineral markets.
