No, it wasn't writing error.
This specific type of flake like surface is characteristic on the novaculite stones, and the stones that appear to have it most frequently are the Turkish oilstones and the Llyn Idwal stones. It's obviously not a Turkish oilstone, in their case, they look different and bigger, and the stone is black or almost black.
In the first photo, you can see that, the left side of the stone has more of those small translucent like flakes, and it's deep coloured/greener. As we go to the left, they gradually disappear, and the stone gets purpler.
There are green-blue like veins in the purple, and near them those flakes appear, and the bigger the distance between those "veins", the smaller the number and size of those flakes.
That's why I think it's a stone was cut from the borders of a Llyn idwal novaculite piece, and contains its novaculite and the purple stone that surrounded it.
Yes, Llyn Idwal stones are not this purple, but I don't think it's a pure one.
Of course I could be wrong, but that's what I'm thinking.