Black stone ball with golden-green shine.

Description:
Pretty ball, probably of black stone, with a golden-green shine that is appreciated when moving the ball, and only in certain positions. It does not have the irregularities of the natural stone, being totally uniform throughout its surface, which is really rare. It could be tourmaline, jet, obsidian, etc. Very rare ball because of its background brightness in certain positions.

Comments:
It presents the own attrition of its time, as well as some stains. The data provided here are unconfirmed personal opinions.