Sulphur

Diameter of the lower right spherule: 5 mm. Hollow spherules of sulphur formed from sulphur melt at the bottom of the crater lake. Volcanic gas bubbles lifted sulphur melt to the pond water, and sulphur melt was cooled imprinting the shape of bubbles. Various forms of sulphur are observed. Sulphur spherules are black by large amount of iron sulfide inclusions.

Recovered from a crater lake formed at a explosion crater of a caldera. Formed in less than 10 years.

Sulphur from this location was described in 1912.