Is it true that vitamin k2 is important to keep calcium in the bone and not the arteries and other tissues?

I recently read that specifically vitamin k2 is what you need to prevent calcium from going to your arteries, from what I understand it is found in egg yolks. This is significant to me because I avoid yolks because of my cholesterol. Also worth knowing that my mother had an EBCT that showed tons of calcium in the wrong places. So, my fear is that by controlling my cholesterol I am damaging myself in another way. Is it true that k1 found in green leafy veggies does not have an effect on the calcium problem? Can I buy K2 in pill form?