#16 Hazuya Unchigumori has a plesent beige cloud pattern against a light gray sky background. A Mohs3 hardness, this stone develops its own slurry under the blade. The slurry creates a darker kasumi finish on the soft iron of a bimetal blade and a dull polish to the hard steel while leaving the edge as you desire or your skill promotes. These factors can be manipulated by a skilled hand, or will vary with different steels or the introduction of a diamond nagura. A 
I am not trained to recognize from which mine this was taken from. Ohira is a likely possibility as the blade tooth marks are 20thCentury. The price of the stone reflects the missing corner,
Free Shipping within the USA. 30 day money back guarantee for what ever reason minus the shipping.