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Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

GD • K/SI1 • GIA 6445506666

Certificate GIA 6445506666

Diamond specifications and retailer prices

From $2,909 SGD
As of November 4, 2026
Save $3,240 SGD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,149 SGD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6445506666. Listed at 15 retailers as of November 4, 2026, with prices from $2,909 to $6,149, a $3,240 spread on the same certified stone. MOH London lists it at $6,149. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6445506666
Dimensions6.60 × 5.95 × 4.24 mm
L/W Ratio1.11
Top View
6.60 mm5.95 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6445506666
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 71.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $6,149 SGD|Low: $2,909 SGD|High: $6,232 SGD|Avg: $3,975 SGD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$2,909 SGD
Retailer 7$3,151 SGD
Retailer 8$3,340 SGD
Retailer 2$3,542 SGD
Retailer 4$3,879 SGD
Retailer 3$4,250 SGD
Retailer 5$4,500 SGD
MOH London$6,149 SGD

38 data points across 8 retailers

15 retailers$2,909 SGD to $6,149 SGD

B+
Cheapest Retailer
-
$2,909 SGD
B+
Retailer 2
-
$2,993 SGD
View
B+
Retailer 3
-
$3,151 SGD
View
B+
Retailer 4
-
$3,300 SGD
View
Retailer 5
-
$3,340 SGD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$3,390 SGD
View
B+
Retailer 7
-
$3,403 SGD
View
B+
Retailer 8
-
$3,542 SGD
View
B+
Retailer 9
-
$3,600 SGD
View
B+
Retailer 10
-
$3,627 SGD
View
B+
Retailer 11
-
$3,879 SGD
View
B+
Retailer 12
-
$4,250 SGD
View
Retailer 13
-
$4,282 SGD
View
Price last confirmed 15 days ago
B+
Retailer 14
-
$4,500 SGD
View
Most Expensive
B
MOH London
6ED3F1AE5 · Nov 4
$6,149 SGD
£3,778 GBP
View
14 more retailers have this diamond
Prices start from $2,909 SGDSave up to $3,240 SGD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.51ct Cushion
$2,909 SGD