Description
Dr. Marv’s Scientific Sharpening stones – Coarse Grit Set:

1x Stone 80 µm
1x Stone 60 µm
1x Stone 40 µm
Size of the Aluminium Blank: 159 x 25 mm x 3 mm
Size of the Abrasive Layer: 150×25 + At least 4 mm thickness
Diamond Concentration: >65% by weight!
These are the “Dr. Marv’s Scientific Sharpening Stones”. They have an unheard of concentration and are absurdly pure and contamination free. This was achieved by very tight, electron microscopy quality control, followed by manufacturing in a laminar flow box. Dressing is done via single point diamond chiseling, which also stops any contamination. Moreover, every set is diamond chiseled individually in the same fixture, so the stones are very, very close in their thickness. I personally do not feel the need to adjust the angle when switching from one stone to the next.
Their development is based on my scientific research into abrasives. I firmly believe that these are super high performing abrasives!
I am very proud to say that the resin, filament, foam, chemicals and aluminium are Made in Germany. Machining of the aluminium blanks was done in Germany. Only the diamond is imported, but meticulously quality controlled via SEM. I am absurdly proud to state that all abrasive stones are handmade by me in the German Alps.
As this is a handmade product, some small blemishes such as tiny bubbles, scratches or imperfections are to be expected. I can promise that they do not subtract from the performance of the sharpening stones!
Please note that you are responsible for any import duties, taxes or custom fees that are arising. Delivery Incoterms are DAP. Customer is responsible for Import Duties, Taxes, Fees.






Lynn Hunton (verified owner) –
Dr. Marv has done it again. Following on from the medium set of stones the new coarse set features a harder resin and is perfect for that toothy edge with an amazing level of gloss. I have found these stones perfect for putting that tomato eating edge on my Nakiri’s without regard to the steel. Like the previous sets, these stones come ready to use with absolutely no surface prep needed. I use a couple drops of oil and the swarf is easily wiped away. I can’t recommend these stones highly enough, you will be amazed at their performance.