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Cushion|Natural|GIA

1.51ct E SI1 Cushion Natural Diamond

ID • E/SI1 • GIA 6541087758

Certificate GIA 6541087758

Diamond specifications and retailer prices

From $6,791 SGD
As of November 6, 2026
Save $6,317 SGD (48%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $13,395 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 E 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 6541087758. Listed at 20 retailers as of November 6, 2026, with a 93% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6541087758
Dimensions7.78 × 5.93 × 3.92 mm
L/W Ratio1.31
Top View
7.78 mm5.93 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6541087758
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.1%

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 6
Current: $13,395 SGD|Low: $6,726 SGD|High: $13,493 SGD|Avg: $9,300 SGD|+1.8%
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
Retailer 15
Retailer 16
Retailer 17
November 7, 2026
Retailer 4$6,791 SGD
Retailer 10$7,147 SGD
Retailer 5$7,546 SGD
Retailer 3$7,773 SGD
Retailer 2$7,834 SGD
Retailer 16$8,028 SGD
Retailer 7$8,257 SGD
Retailer 11$8,257 SGD
Retailer 17$8,260 SGD
Retailer 13$8,516 SGD
Retailer 6$8,682 SGD
Retailer 8$8,753 SGD
Retailer 9$9,151 SGD
Retailer 14$9,720 SGD
Retailer 15$10,914 SGD
Retailer 12$13,108 SGD
Queensmith$13,395 SGD

28 data points across 17 retailers

20 retailers$6,791 SGD to $13,108 SGD

A
Cheapest Retailer
-
$6,791 SGD
A
Retailer 2
-
$7,147 SGD
View
A
Retailer 3
-
$7,546 SGD
View
A
Retailer 4
-
$7,773 SGD
View
Retailer 5
-
$7,781 SGD
View
Price last confirmed 23 days ago
A
Retailer 6
-
$7,834 SGD
View
A
Retailer 7
-
$8,028 SGD
View
B+
Retailer 8
-
$8,257 SGD
View
B+
Retailer 9
-
$8,257 SGD
View
Final sale: no returns
B+
Retailer 10
-
$8,260 SGD
View
B+
Retailer 11
-
$8,302 SGD
View
B+
Retailer 12
-
$8,516 SGD
View
Retailer 13
-
$8,682 SGD
View
Price last confirmed 16 days ago
B+
Retailer 14
-
$8,753 SGD
View
B+
Retailer 15
-
$8,978 SGD
View
B+
Retailer 16
-
$9,151 SGD
View
B+
Retailer 17
-
$9,720 SGD
View
B+
Retailer 18
-
$10,914 SGD
View
B
Retailer 19
-
$13,108 SGD
View
Most Expensive
Queensmith
6541087758 · Oct 28
$13,395 SGD
£8,230 GBP
View
Price last confirmed 10 days ago
19 more retailers have this diamond
Prices start from $6,791 SGDSave up to $6,317 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
$6,791 SGD