Pearl Size
We know that the larger the size, the higher the price. But
price jumps between pearl sizes are often uneven. As the size reach the 8 - 9mm
or above, pearl prices tend to increase much higher.
According to CIBJO
(The world Jewelry Confederation) The Pearl Book, different pearls are measured
by different methods with different minimum unitsĄŻ expression.
Pearl
size measuring methods:
Pearl Size Description
Single Pearl
Round shape: average
diameter
Fancy shape: maximum diameter, maximum length
Pearl size:
<10mm, expressed to the nearest
0.25mm
>,=10mm,
expressed to the nearest 0.1mm
Graduated Strands
Maximum diameter of the largest pearl and the
smallest pearl on the strand
Pearl size:expressed to the nearest
0.1mm
e.g.8.6-13.3mm
Uniform strand
Stated as the minimum size
Pearl
size:expressed to one half(0.5)mm variations
e.g. 7.0-7.5mm