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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 1553998649

Certificate GIA 1553998649

Diamond specifications and retailer prices

From $623 SGD
As of November 6, 2026
Save $1,710 SGD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,333 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553998649. Listed at 15 retailers as of November 5, 2026, with prices from $623 to $2,333, a $1,710 spread on the same certified stone. NZ Jewellers lists it at $2,333. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1553998649
Dimensions8.72 × 4.07 × 2.52 mm
L/W Ratio2.14
Key to symbols
Twinning Wisp, Feather
Top View
8.72 mm4.07 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1553998649
Side View
Table 55.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.9%

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 6
Current: $2,333 SGD|Low: $606 SGD|High: $2,333 SGD|Avg: $981 SGD|+3.6%
NZ Jewellers
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
November 6, 2026
Retailer 4$623 SGD
Retailer 3$686 SGD
Retailer 9$743 SGD
Retailer 15$756 SGD
Retailer 6$774 SGD
Retailer 10$801 SGD
Retailer 14$801 SGD
Retailer 7$859 SGD
Retailer 13$859 SGD
Retailer 2$883 SGD
Retailer 8$904 SGD
Retailer 5$915 SGD
Retailer 11$1,097 SGD
Retailer 12$1,716 SGD
NZ Jewellers$2,333 SGD

30 data points across 15 retailers

15 retailers$623 SGD to $2,333 SGD

A
Cheapest Retailer
-
$623 SGD
A
Retailer 2
-
$686 SGD
View
Final sale: no returns
A
Retailer 3
-
$743 SGD
View
Retailer 4
-
$756 SGD
View
Price last confirmed 20 days ago
Retailer 5
-
$774 SGD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
$801 SGD
View
Retailer 7
-
$801 SGD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$859 SGD
View
Retailer 9
-
$859 SGD
View
Price last confirmed 20 days ago
B+
Retailer 10
-
$883 SGD
View
B+
Retailer 11
-
$904 SGD
View
B+
Retailer 12
-
$915 SGD
View
B
Retailer 13
-
$1,097 SGD
View
B
Retailer 14
-
$1,716 SGD
View
Most Expensive
B
NZ Jewellers
8c553993-763c-4d33-980b-770d3b9d2d4f · Nov 5
$2,333 SGD
$1,820 USD
View
14 more retailers have this diamond
Prices start from $623 SGDSave up to $1,710 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
0.51ct Marquise
$623 SGD