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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6541862635

Certificate GIA 6541862635

Diamond specifications and retailer prices

From $4,338 SGD
HK$26,500 HKD
As of November 2, 2026
Save $4,793 SGD (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,398 SGD at Wholesale Diamonds Direct · As of October 23, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541862635. Listed at 21 retailers as of November 2, 2026, with a 110% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle36.9°
OriginNatural
Grading LabGIA
CertificateGIA 6541862635
Dimensions7.56 × 6.03 × 4.16 mm
L/W Ratio1.25
Top View
7.56 mm6.03 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6541862635
Side View
Table 64.0%CrownGirdle: STK-THKPavilion 36.9°Culet: NoneDepth 68.9%

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 2
Current: $4,856 SGD|Low: $4,273 SGD|High: $9,760 SGD|Avg: $5,935 SGD|-7.8%
Retailer 1
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
Retailer 18
Wholesale Diamonds Direct
November 2, 2026
Retailer 14$4,338 SGD
Retailer 13$4,787 SGD
Retailer 1$4,856 SGD
Retailer 7$5,059 SGD
Retailer 9$5,059 SGD
Retailer 3$5,210 SGD
Retailer 11$5,233 SGD
Retailer 18$5,292 SGD
Retailer 15$5,439 SGD
Retailer 10$5,474 SGD
Retailer 4$5,576 SGD
Retailer 6$5,655 SGD
Retailer 17$5,768 SGD
Retailer 2$5,865 SGD
Retailer 8$5,877 SGD
Retailer 16$6,486 SGD
Retailer 5$7,250 SGD
Retailer 12$9,131 SGD
Wholesale Diamonds Direct$9,398 SGD

19 data points across 19 retailers

21 retailers$4,338 SGD to $9,131 SGD

A
Cheapest Retailer
-
$4,338 SGD
HK$26,500 HKD
A
Retailer 2
-
$4,787 SGD
$3,743 USD
View
A
Retailer 3
-
$4,856 SGD
€3,616 EUR
View
A
Retailer 4
-
$5,059 SGD
$3,956 USD
View
A
Retailer 5
-
$5,059 SGD
$3,956 USD
View
A
Retailer 6
-
$5,210 SGD
$4,074 USD
View
A
Retailer 7
-
$5,233 SGD
A$6,295 AUD
View
A
Retailer 8
-
$5,292 SGD
$4,138 USD
View
Final sale: no returns
A
Retailer 9
-
$5,439 SGD
£3,349 GBP
View
A
Retailer 10
-
$5,474 SGD
$4,280 USD
View
B+
Retailer 11
-
$5,576 SGD
$4,360 USD
View
A
Retailer 12
-
$5,655 SGD
$4,422 USD
View
B+
Retailer 13
-
$5,768 SGD
$4,510 USD
View
A
Retailer 14
-
$5,865 SGD
£3,611 GBP
View
Retailer 15
-
$5,877 SGD
$4,595 USD
View
Price last confirmed 13 days ago
B+
Retailer 16
-
$6,175 SGD
A$7,428 AUD
View
Retailer 17
-
$6,194 SGD
A$7,451 AUD
View
Price last confirmed 24 days ago
B+
Retailer 18
-
$6,486 SGD
€4,830 EUR
View
B+
Retailer 19
-
$7,250 SGD
ZAR 91,576 ZAR
View
B
Retailer 20
-
$9,131 SGD
£5,622 GBP
View
Most Expensive
Wholesale Diamonds Direct
425965099 · Oct 23
$9,398 SGD
$7,348 USD
View
Price last confirmed 10 days ago
20 more retailers have this diamond
Prices start from $4,338 SGDSave up to $4,793 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
$4,338 SGD