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Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2556664337

Certificate GIA 2556664337

Diamond specifications and retailer prices

From $5,877 SGD
HK$35,900 HKD
As of November 1, 2026
Save $6,589 SGD (53%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,466 SGD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556664337. Listed at 19 retailers as of October 28, 2026, with prices from $5,877 to $12,466, a $6,589 spread on the same certified stone. Queensmith lists it at $12,466. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556664337
Dimensions7.67 × 5.90 × 4.08 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.67 mm5.90 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556664337
Side View
Table 70.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 69.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $12,466 SGD|Low: $5,828 SGD|High: $12,563 SGD|Avg: $8,230 SGD|+1.9%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 12$5,877 SGD
Retailer 2$6,269 SGD
Retailer 13$6,551 SGD
Retailer 14$6,699 SGD
Retailer 6$6,920 SGD
Retailer 4$7,230 SGD
Retailer 7$7,328 SGD
Retailer 9$7,515 SGD
Retailer 5$8,033 SGD
Retailer 3$8,194 SGD
Retailer 8$8,555 SGD
Retailer 11$9,624 SGD
Retailer 10$11,540 SGD
Queensmith$12,466 SGD

23 data points across 14 retailers

19 retailers$5,877 SGD to $12,466 SGD

A
Cheapest Retailer
-
$5,877 SGD
HK$35,900 HKD
A
Retailer 2
-
$6,269 SGD
₹466,869 INR
View
A
Retailer 3
-
$6,551 SGD
$5,122 USD
View
A
Retailer 4
-
$6,699 SGD
View
A
Retailer 5
-
$6,920 SGD
View
B+
Retailer 6
-
$7,195 SGD
$5,626 USD
View
B+
Retailer 7
-
$7,200 SGD
$5,630 USD
View
B+
Retailer 8
-
$7,230 SGD
$5,653 USD
View
Final sale: no returns
B+
Retailer 9
-
$7,328 SGD
£4,512 GBP
View
B+
Retailer 10
-
$7,515 SGD
£4,627 GBP
View
Retailer 11
-
$7,834 SGD
A$9,424 AUD
View
Price last confirmed 29 days ago
Retailer 12
-
$7,883 SGD
$6,164 USD
View
Price last confirmed 17 days ago
B+
Retailer 13
-
$7,995 SGD
A$9,618 AUD
View
B+
Retailer 14
-
$8,033 SGD
$6,281 USD
View
B+
Retailer 15
-
$8,194 SGD
$6,407 USD
View
B+
Retailer 16
-
$8,555 SGD
€6,371 EUR
View
B
Retailer 17
-
$9,624 SGD
ZAR 121,565 ZAR
View
B
Retailer 18
-
$11,540 SGD
£7,105 GBP
View
Most Expensive
B
Queensmith
2556664337 · Oct 28
$12,466 SGD
£7,675 GBP
View
18 more retailers have this diamond
Prices start from $5,877 SGDSave up to $6,589 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.

A
1.51ct Cushion
$5,877 SGD