Hilarionite is a very rare hydrated iron hydroxyarsenate sulphate, unique to this mine in the famous old district of Lavrion. This species was approved at the end of 2011. In this good-sized specimen, the hilarionite appears as botryoidal aggregates formed by small crystals, with a more intense greenish-yellow hue in some areas. The specimen was acquired by Erich Laskowsky from Anastasios Tsinidis, a well-known "strahler" (quartz hunter) of Greek origin. A fine piece from the type locality for the species.

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Divergent aggregates of aragonite crystals, very aesthetic, brilliant and transparent to translucent. They are disposed on a matrix with goethite. Aragonite specimens from Lavrion are prized by collectors for their aesthetics.

Divergent aggregate of aragonite crystals, very aesthetic, brilliant and transparent to translucent. They are disposed on a matrix with goethite. Aragonite specimens from Lavrion are prized by collectors for their aesthetics.

A brilliant group of botryoidal smithsonite aggregates. Translucent, pearly luster, white to colorless. On a goethite matrix. Classic locality.

A brilliant group of botryoidal smithsonite aggregates. Translucent, pearly luster, white to colorless. On a goethite matrix. Classic locality.