Hi Hdesousa (is that your name?),
The marbles i've posted,have short straight cut off lines,and some have not,they're smooth.
I've learned from American marble forums that they are made probably in Germany,although i personally doubt the country of origin.
With blacklight the red turns into a kind of brownish purple color.
I have other colors but they have a messy spidery cut off,so probably Japanese.
How can you tell my marbles have a different gather and cut off than yours?
Now that i look again at your pictures it seams they are a bit translucent?