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Thread: Polishing scratched kyanite

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  1. #1
    Join Date
    Feb 2018
    Posts
    9

    Default Polishing scratched kyanite

    Hi all,

    I've scratched my kyanite cabochon stone with the pusher whilst I was setting it. The pusher slipped from the bezel and I ended up with a scratch visible under the light :-( Don't have to deny I feel very upset by my mistake.

    After a bit of search online I have found this US made polishing mandrels impregnated with 2000 grit diamond paste which they say remove surface scratches to stones: stuller.com/products/11-6065/?groupId=1915

    Is there anything similar available to buy in UK that you would recommend? What process would you recommend I would follow?

    Thank you in advance for your help.

  2. #2
    Join Date
    Sep 2014
    Posts
    2,029

    Default

    I use diamond compound pastes from Manchester minerals, you need to scroll right down towards the bottom of this page:
    https://www.manchesterminerals.co.uk...cessories.html
    I use 60, 30, 16, 6, 3 and 1 generally but different stones do vary.
    It lasts for ages so whilst it would be cheaper to just replace your stone its not a bad thing to have around anyway but just one grade would definitely not be sufficient, if its hard enough to remove a scratch it will leave its own scratches hence the need for several grades.

  3. #3
    Join Date
    Oct 2016
    Posts
    85

  4. #4
    Join Date
    Mar 2018
    Location
    Hertfordshire
    Posts
    198

    Default

    Quote Originally Posted by enigma View Post
    I use diamond compound pastes from Manchester minerals, you need to scroll right down towards the bottom of this page:
    https://www.manchesterminerals.co.uk...cessories.html
    I use 60, 30, 16, 6, 3 and 1 generally but different stones do vary.
    It lasts for ages so whilst it would be cheaper to just replace your stone its not a bad thing to have around anyway but just one grade would definitely not be sufficient, if its hard enough to remove a scratch it will leave its own scratches hence the need for several grades.
    Out of interest Enigma, how do you apply it? On a felt polishing mop?

  5. #5
    Join Date
    May 2017
    Location
    Bury Lancashire
    Posts
    52

    Default

    I’ve recently tried micro-mesh sheets from Moleroda Finishing Products. I use regular for silver but they do sheets called micro-mesh mxd diamond for metal alloys, ceramics and stone. The grading system is different to sandpaper but I use up to 2000 normal then on to the sheets and after the last one its almost a mirror finish. If you phone and tell them what its for they will advise.

  6. #6
    Join Date
    Sep 2014
    Posts
    2,029

  7. #7
    Join Date
    Mar 2018
    Location
    Hertfordshire
    Posts
    198

    Default

    Thanks Sarah, now I know what to do if (more likely when) I scratch a stone I’m trying to set!

    Tess

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