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
Continue reading Pierre aiguiser La Lune unlabelled (120 x 60 x 23mm)

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)

Enat light-brown by Ekretz (170 x 64 x 16mm)

Size: 170 x 64 x 16mm weight: 484gr.
Density: xxgr./cm³ / Estimated grit size: very fine < 12k
Usage: with water, glycerine or oil
Color:  beige to light-brown with visible inclusions
Rockhound:
Ekretz
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Thuringian Bout No. 1 (120 x 110 x 25)

Size: 120 x 20 x 75 x 110 x 30 x 25mm weight:  652gr.
Density: XXXgr./cm³ /  Estimated grit size:  very fine > 12K
Usage: only use water, no oil or grease!
Color: light-green (LG)
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Dalmore Blue (150 x 50 x 16mm)

Size: 150 x 50 x 16mm weight:  317gr.
Density: XXXgr./cm³ /  Estimated grit size:  medium > 4k-6K
Usage: can be used with water, glycerine and oil
Color: mostly going into a light brown look with a darker chocolate looking  banding, the banding varies from lines over circles to total swirling. Depending if the stone has been used with oil or not, they can also appear more greyish colored. Also there are variants around looking plain dark
Supplier/Distributor:
Water of Ayr and Tam o Shanter Hone Works
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