Today, I am talking about "potch line".
Do you see black lines on the opal??
They are called potch line.
Potch is normally the host rock
that the opal was cut from
and a small amount remains
on the surface or inside the stone after cutting.
Usually potch line reduces the value of opal
if the line is showing on the surface.
potch line sometimes gives an extra beauty for an opal!!
In this case,
potch lines create a rare pattern.
Its beauty were created by the merest chance.
What a nature!!!!!
Have a lovely day xxx