mineral

Polished bumblebee jasper

Calcite–orpiment/realgar-rich silicified volcanic rock (commercially called bumblebee jasper)

AI-generated identification · may be incorrect

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.

Identified September 12, 2026More mineral →

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Physical properties

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.