I recently bought about 19 whetstones from eBay. It came with the following: kumagoro 4K 6k 8k grit Naniwa 1k 2k 3k 5k Nubatoma 1k 2k 4K Kitayama 12k (although it looks just like the 8k) Shapton 1500 and 8k Norton 8k An unknown 10k grit blue stone An unknown grit Suehiro stone on a stand (100% sure its a suehiro) A 6k gessin (gesshin?) And 2 big bricks that I have no information on except that 1 is a 5k grit and the other feels smoother and denser. Any good ways to go about finding out what the grit is? I’m looking to get better at sharpening so I am not the greatest. But I felt that this was a good purchase. For a total of $275 usd and $55usd shipping, I couldn’t pass up the offer. Prior to this I only had about 6 stones including some naniwas, a Kitayama 8k and some of the cerax line up. Any information would be wonderful, this is also my first post ever, so if I did something wrong I am sorry. Thank you!