SUWA
QUALITY SCALE
UNTREATED MOGOK RUBIES

HOW TO CHOOSE

If one wishes to experience the endless enjoyment and comfort of ruby, gem-quality material is most definitely recommended. Since long ago, confirmation of source and the presence or absence of treatment has served as the basis for establishing the value of the highest-quality pieces. Whether for rubies costing several thousand dollars or those costing tens of thousands of dollars, disclosure of the source and the presence of treatments is absolutely necessary. That way, consumer awareness of the beauty of untreated gemstones will continue to grow, and their character and value will achieve higher recognition.

If making a purchase based on a price/beauty relationship, a beauty grade of S or A with a tone level of 4 is also an excellent value.

The value of a one-carat-size, untreated Mogok ruby of jewelry quality is approximately US $4,000 for the stone alone. (2001)
A GEM OF VALUE
Weight:0.91ct
Size(mm):L5.7 x W4.7 x D4.08
Untreated
Gem Quality
US $6,000
The 3 quality zones as they appear in the quality scale
Quantity distribution of gems that are polished to1-carat size
VALUE INDEX
ct size GQ JQ AAQ
10 180.0 70.0 25.0
3 25.0 12.0 4.0
1 2.0 1.0 0.25
0.5 0.5 0.25 0.06
 
 
 
-GQ-Gem Quality
-JQ-Jewelry Quality
-AQ-Accessory Quality
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