SUWA
QUALITY SCALE
BI-COLORED TOURMALINE
Untreated

HOW TO CHOOSE

When choosing a stone for jewelry use, the key is to select one that shows a distinct separation of pink and light green or light blue pastel colors, without any noticeable defects that detract from beauty.

Since many tourmaline crystals have a long shape, polished stones are often long as well. A piece of unique and exhilarating jewelry based on a solid design concept leaves us with an appreciation of how human imagination can capture the beauty nature has bestowed upon us.

The value of a three-carat-size bi-colored tourmaline of jewelry quality is approximately US $600 for the stone alone.
(2001)
A GEM OF VALUE
Weight:3.64ct
Size(mm):L 14.8 x W 6.2 x D 4.20
Untreated
Gem Quality
US $1,500
The 3 quality zones as they appear in the quality scale

Quantity distribution of gems that are polished to 3-carat size
VALUE INDEX
ct size GQ JQ AAQ
10 10.0 3.0 1.0
3 2.0 1.0 0.3
1 0.7 0.3 0.1
 
 
 
-GQ-Gem Quality
-JQ-Jewelry Quality
-AQ-Accessory Quality
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