“Polish diamond” thread on Jewelry Forum!
Recently i found “Striped Flint - the Polish diamond” thread on Bead Style Magazine Forum. Lovesome writes:
The focal stone in this necklace is a stone that can only be found in Poland. It is very popular now, since there’s not too much of it left in the mines and it is almost as hard as diamonds. It was combined with three various kinds of jasper and oxidised silver.

Banded fling jewelry above
Check it at Bead Style Magazine!