sedimentary

Bumblebee Jasper (technically a type of Agate/Anhydrite)

Calcite and Anhydrite with inclusions of Realgar and Orpiment (As2S3)

Hardness: 3.5-4.0 (Mohs scale), Color: Yellow, orange, black, and grey banding, Luster: Waxy to vitreous, Crystal Structure: Trigonal/Orthorhombic mix, Cleavage: None/Indistinct, Specific Gravity: 2.6-2.7

Hardness: 3

Identified March 9, 2026More sedimentary →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed in fumarole (volcanic vent) environments. It is a sedimentary chemical precipitate found near active volcanic regions where sulfur-rich water deposits minerals in layers. Most specimens are from the Mount Papandayan volcano in Indonesia.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons), and metaphysical collecting. Despite the name 'Jasper', it is softer and usually coated in resin for durability in jewelry.

Geological facts

Bumblebee Jasper is not actually a Jasper; it is a mixture of Indonesian volcano lava and sediment. It contains arsenic (in the form of Realgar and Orpiment), so hands should be washed after handling raw specimens.

Field identification & locations

Identify by its distinct 'bumblebee' yellow and black banding. It is exclusively found in West Java, Indonesia. In the field, look for bright yellow/orange mineral veins near volcanic sulfur deposits.

Other sedimentary specimens

See all

Sandstone or Siltstone

Arenite (if sandstone)

Sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary

Shale or Slaty Mudstone

Argillaceous sedimentary rock

sedimentary

Chert Breccia

Brecciated Chert (Microcrystalline Silica)

sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2)

sedimentary

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

sedimentary