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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6551764597

Certificate GIA 6551764597

Diamond specifications and retailer prices

From $696 SGD
As of November 3, 2026
Save $1,487 SGD (68%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,183 SGD at NZ Jewellers · As of November 3, 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 6551764597. Listed at 6 retailers as of November 3, 2026, with prices from $696 to $2,183, a $1,487 spread on the same certified stone. NZ Jewellers lists it at $2,183. 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
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551764597
Dimensions7.98 × 3.83 × 2.38 mm
L/W Ratio2.08
Girdle conditionThick
Key to symbols
Twinning Wisp
Top View
7.98 mm3.83 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551764597
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 62.2%

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 3
Current: $2,183 SGD|Low: $696 SGD|High: $2,235 SGD|Avg: $1,202 SGD|-2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4$696 SGD
Retailer 6$750 SGD
Retailer 2$830 SGD
Retailer 5$915 SGD
Retailer 3$1,606 SGD
NZ Jewellers$2,183 SGD

28 data points across 6 retailers

6 retailers$696 SGD to $2,183 SGD

A
Cheapest Retailer
-
$696 SGD
A
Retailer 2
-
$750 SGD
View
A
Retailer 3
-
$830 SGD
View
B+
Retailer 4
-
$915 SGD
View
B
Retailer 5
-
$1,606 SGD
View
Most Expensive
B
NZ Jewellers
c3f34689-ff0b-44b5-8d2f-fa347761345c · Nov 3
$2,183 SGD
$1,703 USD
View
5 more retailers have this diamond
Prices start from $696 SGDSave up to $1,487 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
$696 SGD