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Diamond Damage and Repair

Repairing and recutting a diamond does of a careless setter, or while being worn
not happen often, but it does to diamonds as jewelry. When diamonds rub together,
that have been damaged or those that were the sharp edges are worn down. Diamonds
not well made when originally cut. It is are known as angry stones because when
not too often that a jeweler needs they rub together they injure each other,
adequate knowledge in the repair or thus loose diamonds should be kept apart.
recutting of a diamond, but there are Worn diamonds can of course be
some losses due to the lack of a complete repolished, but doing this a number of
understanding of the possibilities. times will cut down on the weight of the
The most common of all diamond injuries stone.
in the trade is the chipping of the edge, Another type of injury that happens to
or girdle, of the brilliant during the diamonds is excessive heating, as in fire
operation of the setting the stone. It is exposure. If a diamond is heated to a
the popular opinion of the public that high enough temperature, it can unite
diamonds are too hard to suffer with the oxygen from the air causing
mechanical injury. However this is not blemishes. The damage to the stone can be
the case, the use of a careless file can substantial and fixing it will result in
lift tiny flakes from the upper surface a loss of weight.
of the brilliant. While the diamond is Recutting of diamonds is also worth a lot
much harder than a file it is not as of attention. Recutting is usually an
tough. Most often when a file is misused option when
a thin layer of diamond splits off. The Antiquity of the existing make
split forms a perfect cleavage of the Over thickness, or lumpiness exists
diamond, which causes it to split easily An overspread condition of the diamond
in certain directions. The rough cleavage Diamonds in the old-fashioned square or
will reflect in every part of the stone. cushion shape, with overthick make and
This type of serious injury can ruin the with a large cutlet are known in the
stone. trade as old-mine stones. These old mine
Whenever a stone owned by a jeweler or stones are becoming a bit scarce, most of
customer is injured, it should be sent to them have already been cut to modern
a competent diamond cutter, who, unless form. Often old-mine stones end up in the
he is instructed to remake it to the hands of pawnbrokers because most
ideal proportions, regardless of loss of jewelers will not give them the time of
weight, will use his best judgment in day. Often times the old-mine stones are
repairing the injury so as to leave the left too thick and are considered lumpy.
stone in the best salable condition. Not every old mine stone has the
When an injured stone is offered for remakings of a fine gem. It pays for
sale, and there is not an opportunity to jewelers to study cutting and remaking of
have it studied by an expert, the jeweler old gems. Having this type of knowledge
must look at the stone and decide how will almost always help the jeweler in
much the stone will sell for repaired. detecting faulty make in modern cut
When purchasing a damaged stone jewelers stones.
will often give low offers. The risk of In the case of overspread stones the
buying a damaged stone is that, when the central weakness or fish eye effect can
repaired stone is sold it will not yield be corrected by recutting to reduce the
the type of return the jeweler would have spread. Spread is a very desirable
expected. feature in a diamond, care must be used
Diamond injuries also occur in the hands to not reduce it unnecessarily.




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