SUWA
GEMSTONE VALUE COMPARISON CHARTS
These charts are arranged with diamond at the star, followed by a listing by mineral type in alphabetical order. Four gemstone types with their weights represented in grams are listed last. Symbols following: N-Untreated; H-Heat Treated; I-Impregnation Treated or Fracture-Filled. These charts are meant to serve as a reference for determining relative value, and are not meant to be a price list. Confirm the three quality zones for each gemstone type when using these charts.
Colombian Emerald (I) Mong Hsu Ruby (H)
ct size GQ JQ AQ
10 2000 300 50
3 700 100 15
1 150 30 3
0.5      
ct size GQ JQ AQ
10      
3 500 200 25
1 50 30 7
0.5 10 5 2
Zambian Emerald (I) Sir Lankan Star Ruby (H)
ct size GQ JQ AQ
10      
3 400 80 15
1 120 30 3
0.5 30 7 2
ct size GQ JQ AQ
10 800 300 100
3 150 80 25
1 15 8 3
0.5      
DIAMOND    
Round Brilliant
Diamond (N)
ct size GQ JQ AQ
10 4000 2000 1000
3 1000 500 200
1 180 100 40
0.5 80 40 20
Fancy Blue
Diamond(N)
ct size GQ JQ AQ
10      
3 7000 3000 700
1 1500 800 150
0.5 400 200 80

Zambian Emerald (N)
ct size GQ JQ AQ
10      
3 600 300 -
1 200 100 -
0.5 80 40 -

Sri Lankan Sapphire (H)
ct size GQ JQ AQ
10 800 150 30
3 150 40 8
1 20 10 2
0.5      
Emerald-Cut
Diamond (N)
ct size GQ JQ AQ
10 3500 1500 -
3 700 400 -
1 120 70 -
0.5 50 25 -
Fancy Pink
Diamond (N)
ct size GQ JQ AQ
10      
3 7000 3000 700
1 1500 800 150
0.5 400 200 80
CHRYSOBERYL
Alexandrite (N)
ct size GQ JQ AQ
10      
3 500 250 20
1 100 40 8
0.5 30 12 2

Sri Lankan Sapphire (N)
ct size GQ JQ AQ
10 1000 250 70
3 250 70 12
1 25 12 3
0.5      
Pear-Shaped*Marquiise-Cut Diamond (N)
ct size GQ JQ AQ
10 3500 1500 800
3 700 400 150
1 120 70 25
0.5 50 25 15

Fancy Yellow
Diamond (N)

ct size GQ JQ AQ
10      
3 1500 800 300
1 300 150 80
0.5 50 30 15
Cat's-Eye
Chrysoberyl (N)
ct size GQ JQ AQ
10 700 400 150
3 150 80 30
1 25 8 3
0.5      

Kashmir Sapphire (N)
ct size GQ JQ AQ
10 5000 2500 -
3 2000 1000 -
1 300 150 -
0.5      
Princess-Cut
Diamond (N)
ct size GQ JQ AQ
10 3500 1500 800
3 700 400 150
1 120 70 25
0.5 50 25 15
BERYL
Aquamarine (H)
ct size GQ JQ AQ
10 120 50 15
3 40 10 3
1 10 3 1
0.5      
CORUNDUM
Mogok Ruby (N)
ct size GQ JQ AQ
10 12000 5000 1500
3 1500 800 250
1 120 70 15
0.5 30 15 4

Star Sapphire (N)
ct size GQ JQ AQ
10 600 250 40
3 150 50 5
1 15 8 2
0.5      
Index
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