hematite matrix

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Bumblebee Agate skull  - Java

Bumblebee Agate (sometimes called Bumblebee Jasper) has been known only since the late 1990s and has been found only on the Indonesian island of Java. It is not really agate or jasper but a mix of minerals in a matrix of a volcanic material mined from sulfur vents. It is composed of anhydrite (gypsum), sulfur and hematite in a matrix of volcanic tuff (welded ash). It may also contain plumose calcite and ilmenite.