Technical Jasper Whetstone [6″ x 1″]

Jasper sharpening stones are used for finish sharpening and honing knives on Hapstone and Edge Pro sharpeners. Jasper is a naturally abrasive material of high density. Jasper stones are mounted on high quality aluminum blanks.

Jasper is mined in the Ural mountains in Russia. Jasper is a dense, opaque variery of cryptocrystalline chalcedony, contains significant proportion of Fe-oxides and hydroxides. Jasper does not consist of individual abrasive grains of the same size. A Jasper microquartz structure consists of a fused crystal grains of different sizes.

Specification

• Product size: 160 x 25 x 9 mm (6″ x 1″ x ⅓“)
• Working surface: 152 x 25 x 6 mm (6″ x 1″ x ¼“)
• Weight: 100 g (3.5 oz)
• Abrasive: Сryptocrystalline Quartz
• Extra materials: Aluminum Blank, 3M PSA

How to use

Jasper stones should be used with one of these lubricants:

• Refined olive oil
• Oleic aсid

Jasper stones do not have any minor defects.

Jasper stone does not require any preparations. It is naturally lapped to ultra-fine grit. This is a big advantage because the difficulty of lapping Jasper is very high.

Q & A

• What grit do Jasper natural stones have?

  Grit terminology is not applicable to natural sharpening stones, including Jasper. The behavior of a natural stone depends on its density and how good it was lapped. However, experts estimate Jasper as 8000 – 10000 JIS.