Haha I have to do the same thing. The streak color is whiteish but doesnt really show well on testing material because it is so strong. But just to give you an answer, it is a white color when you look closely
In diamonds the streak is described as either white or colourless, rather than clear. You can find a good overview of diamond properties here.
It has no steak
You want to know what it is its oboma
It does not have one because a diamond is so strong, it leaves no streak on the testing material
I think it is clear
I think its whitish