Category Archives: Rock Type

Pierre Du Sud-Ouest – French Mystery Stone

Size: 200 x 50 x 19mm weight:  573gr.
Density: XXXgr./cm³ /  Estimated grit size:  medium – fine > 4-10K
Usage: should be used with water
Color: a yellow to beige to yellow-green color mostly
with plant inclusions
Other names:
Pierre Du Sud-Ouest, French mystery Stone,
French Thuringian, Pierre D’italie

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James Howarth & Sons Genuine Grecian Hone (180 x 32 x 29mm)

Size: 180 x 32 x 29mm weight:  413gr.
Density: XXXgr./cm³ /  Estimated grit size:  medium – fine > 4K – 9K
Usage: should be used with slurry, water
it can be used with glycerine and oil to buffer the contact and gain better results
Color: green-grey to olive-green, sometimes with typical swirled/banded structures in a
dark-grey or dark-blue. This banding sometimes looks like a swarfing or waves.
Other Names:
Llyn Idwal Stone, Grecian Stone, Grecian Oil Stone
Supplier/Distributor: James Howarth & Sons, Sheffield

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Bavarian-Frankonian Bout Stone No.2 (130 x 50 x 25mm)

German Translation
Size
: 130 x 50 x 20-25mm weight: 414gr.
Density: xxgr./cm³ / Estimated grit size: fine < 8K – 10K)
Usage: only with water
Color: whittish-grey with brown iron-oxide lines,
backing bronze and pearl white metallic look
Other names:
Bayrischer-Franke, Bavarian-Frankonian, Frankenstein
Rockhound:
Hatzicho
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O-Ha! Magnet = Elektrostein (98 x 30 x 10mm)

Size: 98 x 30 x 10mm weight: 80gr.
Density: xxgr./cm³ / Estimated grit size: very fine <12k
Usage: only with water, never use oil!
Color: green-grey, dark-grey, sometimes going in brown, mottled structure with black, blue, rose or green coloration
Other names:
mottled Thuringian, Schwedenstein, Swedenstein
Supplier/Distributor:
Otto Hunger, Elsterberg (Sachsen)
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Chinese Water Hone C12K (200 x 50 x 20mm)

Size: 200 x 50 x 20mm weight: 647gr.
Density: xxgr./cm³ / Estimated grit size: very fine <12k
Usage: with water
Color: light-grey to grey-green, sometimes orange lines or inclusions
Other names:
Chinese River Hone, C12K, Kajima, PHIG, Chinese Pulpstone
Supplier/Distributor:
actually there seems to be a lot of sellers and a lot of re-branded stones around
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Pierre aiguiser La Lune unlabelled (120 x 60 x 23mm)

Size: 120 x 60 x 23mm weight: 439gr.
Density: xxgr./cm³ / Estimated grit size: ultra fine > 12k
Usage: with water, glycerine or oil
FGBC wrote in their Instructions to use the stone with oil
Color: dark-purple, violet with a visible flash like pattern
Supplier/Distributor:
F.G.B.C. / F. Ghelfi, Birroleau & Cie. or Manufrance
this stone is un-labelled
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Pierre aiguiser La Lune un-labelled (160 x 75 x 30mm)

Size: 160 x 75 x 30mm weight: 1180gr.
Density: xxgr./cm³ / Estimated grit size: ultra fine > 12k
Usage: with water, glycerine or oil
FGBC wrote in their Instructions to use the stone with oil
Color: dark-purple, violet with a visible flash like pattern
Supplier/Distributor:
F.G.B.C. / F. Ghelfi, Birroleau & Cie. or Manufrance
this stone is un-labelled
Continue reading Pierre aiguiser La Lune un-labelled (160 x 75 x 30mm)