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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5566372644

Certificate GIA 5566372644

Diamond specifications and retailer prices

From $8,283 SGD
HK$50,600 HKD
As of November 1, 2026
Save $10,143 SGD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $18,426 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise 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 5566372644. Listed at 11 retailers as of October 30, 2026, with prices from $8,283 to $18,426, a $10,143 spread on the same certified stone. NZ Jewellers lists it at $18,426. 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
PolishVery Good
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5566372644
Dimensions11.71 × 5.87 × 3.69 mm
L/W Ratio1.99
Girdle conditionMedium to Very Thick
Key to symbols
Crystal, Feather, Needle
Top View
11.71 mm5.87 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5566372644
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 62.8%

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: $18,426 SGD|Low: $8,218 SGD|High: $19,746 SGD|Avg: $11,726 SGD|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$8,283 SGD
Retailer 3$8,425 SGD
Retailer 10$8,901 SGD
Retailer 9$9,740 SGD
Retailer 4$10,454 SGD
Retailer 5$10,917 SGD
Retailer 7$11,018 SGD
Retailer 2$11,187 SGD
Retailer 6$15,354 SGD
NZ Jewellers$18,426 SGD

35 data points across 10 retailers

11 retailers$8,283 SGD to $18,426 SGD

A
Cheapest Retailer
-
$8,283 SGD
HK$50,600 HKD
A
Retailer 2
-
$8,425 SGD
₹627,397 INR
View
B+
Retailer 3
-
$8,901 SGD
$6,960 USD
View
Final sale: no returns
B+
Retailer 4
-
$9,740 SGD
$7,616 USD
View
Retailer 5
-
$9,757 SGD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$10,454 SGD
£6,436 GBP
View
B+
Retailer 7
-
$10,917 SGD
£6,722 GBP
View
B
Retailer 8
-
$11,018 SGD
$8,615 USD
View
B
Retailer 9
-
$11,187 SGD
$8,747 USD
View
B
Retailer 10
-
$15,354 SGD
£9,453 GBP
View
Most Expensive
B
NZ Jewellers
c46d6811-9a3a-4d37-b07f-f337090d5828 · Oct 30
$18,426 SGD
$14,408 USD
View
10 more retailers have this diamond
Prices start from $8,283 SGDSave up to $10,143 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 Marquise
$8,283 SGD