Results 1 to 7 of 7

Thread: Stone ID

  1. #1
    Member
    Join Date
    Feb 2011
    Posts
    37
    Thanked: 0

    Default Stone ID

    This stone is extremely hard a dmt 325 won't hardly touch it.
    When I got it I looked like it was around a 200K, very porous.
    It seems to be as hard as a Translucent, I was able to fatten it enough to get two large shiny spots on the face and they look like glass. This stone only liked a 1/32" of being flat.
    It is formation rock or synthetic I believe. It is tan in color with just a tinge of a red shade especially where I polished it on the 325 dmt. In the pictures the red comes outlooks like BBW, but with the naked eye it looks tan almost like a Frictionite. Where I polished the stone It will polish metal, where it is still rough it cuts. I have never seen anything like it except the new translucent Arkansas I got that set a bevel until I was able to get it polished, took forever. Any help will be appreciated.
    Thanks, russhiName:  DSCI0120.jpg
Views: 257
Size:  20.3 KBName:  DSCI0121.jpg
Views: 267
Size:  33.3 KBName:  DSCI0124.jpg
Views: 250
Size:  20.5 KBName:  DSCI0123.jpg
Views: 241
Size:  18.6 KBName:  DSCI0122.jpg
Views: 249
Size:  23.1 KBName:  DSCI0126.jpg
Views: 253
Size:  50.5 KBName:  DSCI0125.jpg
Views: 249
Size:  34.5 KBName:  DSCI0128.jpg
Views: 284
Size:  20.8 KBName:  DSCI0127.jpg
Views: 259
Size:  49.9 KB

  2. #2
    'tis but a scratch! roughkype's Avatar
    Join Date
    Oct 2010
    Location
    Durango, Colorado
    Posts
    2,080
    Thanked: 443
    Blog Entries
    2

    Default

    Well, here's my weird theory: it IS a coarse man-made hone and you glazed a couple of high spots, or wore down the grit and get good polishing from the binder. Did it wear anything off your DMT?

    I can't imagine how a really fine hone would gain such a coarse looking surface. Into that vacuum of imagination, then, steps weird theory.
    "These aren't the droids you're looking for." "These aren't the droids we're looking for." "He can go about his business." "You can go about your business."

  3. The Following User Says Thank You to roughkype For This Useful Post:

    russhi (11-12-2011)

  4. #3
    Member
    Join Date
    Feb 2011
    Posts
    37
    Thanked: 0

    Default

    You may be right. The 325 would took forever. I got out the plate glass and the 90 grit silicon carbide lapping and took it to 180 grit, it took close to an hour and will have to work on it a little more in the morning. I pick up stones of any kind, every chance I get and have been doing it for 10 years. I flatten silicon carbide and aluminum oxide stones all the time and I can do it quick, but this stone is a different color and texture than any synthetic stone I have ever run across, besides being as hard a translucent Arkansas. almost impossible to flatten. I don't know if you have ever used 90 grit on plate glass before, It will flat eat up a stone. I usually use it on India oil stone, which this might be what this is.

  5. #4
    Senior Member
    Join Date
    Mar 2009
    Posts
    1,211
    Thanked: 202

    Default

    Is it harder than flattening India stone? This would be my guess.

  6. The Following User Says Thank You to adrspach For This Useful Post:

    russhi (11-12-2011)

  7. #5
    Member
    Join Date
    Feb 2011
    Posts
    37
    Thanked: 0

    Default new pictures

    Name:  DSCI0131.jpg
Views: 183
Size:  25.6 KBName:  DSCI0130.jpg
Views: 179
Size:  19.5 KBName:  DSCI0129.jpg
Views: 192
Size:  9.9 KB
    I lapped it with 90 grit, followed by180 grit on glass and finished up on a dmt 325. finally got it slick. when you look down the face at an angle looking at the like it shines like a mirror. I set the bevel on a razor I was working on. I would guess the grit to about like a hard Arkansas, but cut faster. I used it with water. I have some India oil stones but don't know much about them, except I tried lapping them and I quit because they were to hard. This stone is a different color than my combination India oil stones. They are red and black. this stone is solid and is a light tan. Doe's the color of India oil stones indicate their grit. The color of this stone looks a lot like a Frictionite, it honed done like glass.

  8. #6
    Member
    Join Date
    Feb 2011
    Posts
    37
    Thanked: 0

    Default

    It may be a India oil stone, but the color looks like a frictionite

  9. #7
    Member
    Join Date
    Feb 2011
    Posts
    37
    Thanked: 0

    Default

    the pictures look red, but the stone is tan. When it is wet it has a little red cast to it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •