Silkstone doesn't have so pronounced lines, you can barely see them if the stone is dry, and its usual color is dark green blue, almost black. The pattern from the stone above can be present in any slaty stone, there is nothing about it that helps us identify this stone.
The silkvein stone came in very limited numbers with papers and boxes that say what it is, so I doubt it.
Don't worry about it. Hone Identification is an abyss.