Stone(s): Wild septarian, premium quality
Color: black
Dimensions: H 29.5 cm x W 18 cm
Approximate weight: 8.5 kg
Stone size: polished egg
Photos are contractual.
Classification: no classification. Septarian is a sediment concretion formed by a complex mixture of minerals (silica, calcite, etc.). It is not an officially recognized mineral species, but rather an aggregate of various minerals.
Mohs hardness: Intermediate hardness. Composed of various minerals: on the Mohs hardness scale, chalcedony is at 7 and calcite at 3.
Density: 2.5 to 2.7, variable depending on the proportion of minerals
Origin: Madagascar
Care instructions: use a soft cloth and lukewarm water for cleaning. Handle with care to avoid scratches or impacts, as some minerals like calcite can be sensitive.




























