Shapton GlassStone 8000 Grit Ceramic Whetstone – 1 Micron Type WA

The Shapton GlassStone 8000 is a high-grit finishing waterstone for polishing an already sharp edge. Its 1-micron-class Type WA abrasive layer refines fine-stone scratches and produces a smooth, highly polished finish on appropriate kitchen knives.

This is the full-size Shapton GlassStone GS/HR model—not GlassStone Seven, RockStar, or the HC formulation. Type WA identifies Shapton’s white-alumina abrasive. A 5 mm sharpening layer is permanently laminated to 5 mm tempered glass for a precise, stable working surface.

Why choose the 8000 grit

Polishes edges after 4000- to 5000-grit finishing

Refines the final burr and fine scratch pattern

Delivers a high level of finish in a compact glass-backed format

Specifications

Brand: Shapton

Series: GlassStone / GS Series HR

Manufacturer SKU: 50203

Barcode: 4944509502039 (GTIN-13 / JAN)

Grit: 8000

Particle class: 1 micron class

Abrasive type: Type WA (white alumina)

Construction: 5 mm abrasive layer laminated to a 5 mm tempered-glass base

Dimensions: 210 × 70 × 10 mm (8.27 × 2.76 × 0.39 in.)

Product weight: Approximately 360 g (12.7 oz.)

Water preparation: Splash-and-go; no soak required

Included: One GlassStone; holder sold separately

Country of origin: Japan

How to use

Secure the stone on a non-slip stone holder with the abrasive face up.

Add clean water and begin sharpening. An optional 5–6 minute wetting can improve feel, but long soaking is unnecessary.

Maintain a consistent angle and use controlled pressure, adding water as needed.

Flatten periodically with a compatible lapping plate to preserve accuracy.

Care

Rinse after use and let the stone dry completely at room temperature before storage. Do not use detergent, hot water, direct sun, forced heat, or long-term soaking. Keep the sharpening face flat and free of embedded coarse grit.

Build a Shapton progression

Use after the GlassStone 4000 or Kuromaku 5000. This is a finishing stone, not the first choice for a dull or damaged edge. Browse the full Shapton whetstone collection.

Common questions

Does a GlassStone need soaking?

No. It is designed for splash-and-go use. A brief optional wetting can improve feel; avoid long soaking.

What does Type WA mean?

WA is Shapton’s designation for white alumina, the abrasive used in this model.

Is this a RockStar or GlassStone Seven?

No. This is the full-size, 210 × 70 mm GlassStone with a 5 mm abrasive layer on a 5 mm tempered-glass base.