SUWA
QUALITY SCALE
PARAÍBA TOURMALINES
Heated

HOW TO CHOOSE

Paraíba tourmaline is a completely new gem variety. Though it is mineralogically classified as tourmaline, its appearance is vastly different from any material seen up to now. Its fluorescent blue or green color is more vivid than that of any other gemstone, and sets it apart from the refine beauty of traditional gems.

The key in choosing a Paraíba tourmaline is to select a stone in one of these unique, vivid colors, regardless of size. Another appeal of this material is that offers these brilliant colors not only in gem-quality stones, but in those of jewelry quality and accessory quality as well.

The value of a one-carat-size Paraíba tourmaline of jewelry quality is approximately US $2,500 for the stone alone (2004).

The 3 quality zones as they appear in the quality scale
Quantity distribution of gems that are polished to 1-carat size
 
VALUE INDEX
Carat(s) GQ JQ AQ
3 20.0 4.0 1.3
1 4.0 1.0 0.1
0.5 0.7 0.2 0.05
 
 
 
-GQ-Gem Quality
-JQ-Jewelry Quality
-AQ-Accessory Quality
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