■ Overall Evaluation Hardness: ★★★★★ (Hard) Density: ★★★★★ (Very dense) Lotus Flower Density: ★★★★★ (Red dots of lotus flowers across the entire surface) Tea Veins/Nesting: ★★★★☆ (Only natural veins, no impact on use) Layering Stability: ★★★★★ (Neat layering on both sides and the back) Practical Performance: ★★★★★ (Suitable for sword ground luster to blade luster) Grade: Excellent to Special Grade (Oohira Mountain Lotus Flower Uchigumori) --- ■ Grinding Surface When dry, it's a pale bluish-gray color, and when wet, it becomes a strong bluish-gray to blackish-blue. Red dot-like iron particles (the core of the lotus flower) are visible across the entire surface, a testament to the dense layers. The abrasive grains are uniform, with no coarse nesting that could cause sand-biting. When tested on a sword, both the blackening and the fineness of the clouding are of the highest grade. A finish comparable to the finest nesting board layers can be achieved. --- ■ Sides and Back The yellowish-brown to pale purple layers characteristic of Oohira Mountain are visible, clearly indicating the origin. The yellow layer on the back is a natural layer close to the mountain surface, proof that it was cut from the high-quality upper layers of the grinding surface. The layering is stable, and cracks and fissures are limited to shallow areas. --- ■ Lotus Flower Pattern Even when dry, fine red dots (the core of the lotus flower) are scattered across the entire surface, a dense lotus flower type. The balance of hardness and grain size is excellent, suitable for both ground luster and blade luster polishing. The mud is somewhat restrained, but the particles are fine, producing a natural blackening without crushing the ground iron. --- ■ Cured and ready to use. ■ Please refer to the images for the size. #Uchigumori #NaturalWhetstone #OohiraMountain #Sword #GroundLuster #BladeLuster #Sharpening #LotusFlower