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A rai stone (Yapese: raay), [1] or fei stone, [2] is one of many large artifacts that were manufactured and treasured by the native inhabitants of the Yap islands in Micronesia. They are also known as Yapese stone money or similar names. The typical rai stone is carved out of crystalline limestone and shaped like a disk with a hole in the ...
They are 0.2 to 1.2 m (7.9 in to 3 ft 11.2 in) tall and often decorated with geometric designs such as horizontal bands, flowing water patterns or spirals. [25] [29] A few bells feature the earliest Japanese depiction of people and animals. [25] [30] In addition ornamental jewels were found.
The Japanese traditionally use natural sharpening stones (referred to as tennen toishi [15]) wetted with water, as using oil on such a stone reduces its effectiveness. The geology of Japan provided a type of stone which consists of fine silicate particles in a clay matrix, somewhat softer than novaculite . [ 16 ]
Japanese sword blade and sharpening stone and water bucket at 2008 Cherry Blossom Festival, Seattle Center, Seattle, Washington. Sword polishing is part of Japanese swordsmithing where a blade is polished after forging. It gives the shining appearance and beauty to the sword.
There are two common methods to manufacture diamond grinding cup wheels: hot pressing and cold pressing. The hot pressing method is to directly sinter the diamond segments in molds under a certain pressure in the dedicated sintering press machine, and then fix or connect the diamond segments onto the grinding wheel’s body via high-frequency welding, laser welding or mechanical mosaic method.
November's consumer price index report, released on Wednesday, showed consumer prices rising 0.3% in November, following four consecutive months of 0.2% increases, with the yearly rate climbing to ...
A masterclass in clock management it was not from Atlanta Falcons head coach Raheem Morris as his team fell 30-24 in overtime to the Washington Commanders.. The first-year coach failed to properly ...
The idea behind the first step is to take rough rock or stone and grind it (tumble it) down into a form which is indistinguishable (in shape) from the final product. [3] This is followed by washing and then a stage of finer grits (120-220 then 400-600 mesh), before the (optional) use of a pre-polishing compound (1200 grit), a washing cycle with ...
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