These are cut blocks of grey/green soapstone- It is a semi translucent fine grained stone that turns military green when polished. There are frequently veins of the aqua running through it - sometimes those are a good surprise (sometimes not...)
It is beautiful and very easy to carve.
Please note: These stones are not finished pieces as is; they are cut blocks for typically for carving. The blocks differ slightly in size, weight and colors and may not have perfect edges.