Got 2 stones from ebay bought from france and came with razors

I am not sure what they are.

First one come on paddle it was covered with oil and was very black, i have flatten it and it become very light and even in color no lines or blemishes (no glittering ether) very smooth and fine stone not hard at all.
Size: 160mm 60mm






Second one came with 2 razors
covered with oil too very very hard stone after lapping it show that it is brown transparent stone glass like but much finer then Arkansas i have 2 Arkansas and they are not as smooth as this one this one is like honing on my super hard Ozuku
size: 115mm 55mm






Thanks for help !!