The weight is 7

opaque variery of cryptocrystalline chalcedony

It's very important to keep a sharpening angle consistent

The actual photo of the stone with no Photoshop is shown

jasper stone kmex The weight is 7Technical Jasper sharpening stones are used for finish sharpening and honing knives on Hapstone and KME knife sharpeners. Technical Jasper is a naturally abrasive material of high density. Technical Jasper is mined in the Ural mountains in Russia. Jasper is a dense, opaque variety of cryptocrystalline chalcedony, contains a significant proportion of Fe oxides and hydroxides. Jasper does not consist of individual abrasive grains of the same size. A