[Jewelry making - Article 00115] - Re: [Orchid] Repolishing Tanzanite?

[Helen Hill]

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>     Is there any way that just the top can be polished without
>     recutting the entire top of the stone? 

    That's an interesting question and I suppose it depends on the stone
    under discussion, ie. how extensive the wear on the table edges -
    and of course what shape it is. That'll make a huge difference. 

    For a round brilliant, my assumption is that if you only recut the
    table facet, the crown facets will no longer meet corner to corner
    (table to kite - the kite's top point will be cut off, star to star
    will have a line separating them rather than point to point
    meeting), and therefore you'd have to recut all the upper facets.
    Even then it may be better to recut the whole stone. If it had a
    thick girdle, then I'm guessing you could recut the upper facets
    only, just leading to a reduction in height of the upper part of the
    stone and therefore the overall height of the stone and the thickness
    of the girdle would be reduced. 

    For a trillion, oval, pear, marquise, the same would apply I would
    think. 

    For an octagon/emerald cut, then it is more likely that you could
    get away with just recutting the table as the crown facets are
    parallel to it so the facet to facet junctions are not as critical as
    the other cuts. 

    Just my humble opinion based on observation of the different cuts
    (I'm a wannabe faceter at heart) ;-) 

Helen
UK
http://www.hillsgems.co.uk
http://www.helensgems.etsy.com
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