The Bismuth stones are well known to support the kundalini stimulation. Bismuth can help remove the blocks that we place in our path. Bismuth has meaning and properties of making the vision of the future clear. It is a good gemstone to know where to go and what to do. It would prevent you from changing your direction in the middle.
approx 100-110g. (two of the pictures is the same piece, from different angles)