The truth about
It is a
total misconception and usual misinformation that
up to what, on a grading report would be considered as
even 'strong', have any influence at all on the clarity or
the light refractive qualities of
After the strong classification one enters the realm of
the 'intense' levels
of fluorescence, these will, in
the very worst of cases, in
the form of an opaque 'cloud' have an effect on the
the diamond and
will be qualified as such on the grading report.
It is quite the contrary in fact to this misplaced
information that fluorescence in
a diamond is undesirable.
Before certificates came
about, in Europe, we
used to call the best possible colour
as 'blue white' colour. This equates in fact to a 'D'
colour with strong fluorescence,
a most desirable combination as it gave the diamond that very
special bluish 'ice white' feel that only these types
can give as opposed to
the 'ordinary' 'D' colour.
Now if you thought that a 'D' colour was rare, then a
'blue white' is far rarer.
For every 20 'nil' fluorescent 'D' coloured diamonds you
may possibly have 1
strong fluorescent one if that. This is the main reason
why dealers talked them
down as once
certificates became popular, they were so rare that
dealers would miss out on clients requiring the best
there was, possibly
having to wait many weeks until
one came around. Nobody, therefore, had
an advantage in 'pushing' them so they became less
desirable, due to market 'hype'.
That's the true picture so if you talk about 'slight' or
'medium' or even 'strong'
fluorescence in a diamond the clarity and
brilliance (sparkle) will
most certainly not be
affected in any way. Fluorescence can be yellow, green
and tints of these not only blue.
If someone has made you believe the contrary have
him/her get in touch with us and we will
put them back
on the right path.
In fact with diamonds in colours below the 'I' colour, fluorescence
has a very beneficial influence
on the diamond as it makes the diamond look whiter from
In everyday wear, especially under sunny conditions, say
a strong fluorescent 'K'
colour will look as white as a 'G' or even as an
'F' as the fluorescence will
add a blue (whiter)
tint to the diamond. These will sell better and be more
desirable and more expensive in the process.
This is proof that
fluorescence does not affect clarity or
anyway as long as it is not 'overly intense' of course.
to answer any further questions on this subject.
Member of the Antwerp Diamond Bourse since 1972