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Product price and shipping fee

05 "COFFEE" Premium Black Granite, Cylindrical Shape, Matte Finish

$960 USD

Payment is via Paypal only

We can ship to countries worldwide via UPS, and the price is the same for all countries.

Price including shipping

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COFFEE MILLSTONE

---OVERVIEW---

The stone material used is the extremely rare "highest grade black granite". This stone is characterized by the absence of crystalline particles and a higher specific gravity compared to other granites.

The millstone may develop stains from the oil of coffee beans after long-term use, but due to the jet-black stone material, they are hardly noticeable.

The exterior is divided into 16 equal parts and shaped into a twisted rhombus.

The surface is roughened with a chisel to represent the waves of Amakusa Nada, and then polished to express the reflecting light.

This process gives a subtle reflection to the entire side surface and creates a unique atmosphere with irregular chisel marks.

---DESIGN---

The top millstone is designed to hold enough for two people (about 20g) at a time, but by repeating the process, it can grind enough for many people without generating heat, which is a problem for "bean scorching" (it is said that exposing coffee beans to extreme heat increases bitterness).

The diameter of the grinding surface was determined to be 5.0 sun (about 15cm), which is sufficient and does not over-grind based on prototype results, and the height of the top millstone was decided based on the necessary weight.

The bottom millstone has a donut-shaped groove on the outer circumference of the grinding surface with a diameter of 5 sun, a width of 8-9 bu (24mm-27mm), and a depth of 5 bu (15mm), designed to receive the ground powder.

There is a "hole" in one place of the donut-shaped groove, and the ground powder falls from the groove into the hole with each rotation due to the "brush" attached to the lower part of the top millstone.

The "hole" part of the bottom millstone is processed to have an opening of 10cm wide, 10cm deep, and 6cm high to allow a "receiving tray" to be set, determining the height of the bottom millstone.

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