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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 3555975462

Certificate GIA 3555975462

Diamond specifications and retailer prices

From $544 SGD
$425 USD
As of November 2, 2026
Save $1,769 SGD (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,312 SGD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555975462. Listed at 12 retailers as of October 30, 2026, with prices from $544 to $2,312, a $1,769 spread on the same certified stone. NZ Jewellers lists it at $2,312. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 3555975462
Dimensions4.06 × 9.29 × 2.43 mm
L/W Ratio2.29
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
4.06 mm9.29 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 3555975462
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.9%

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: $2,312 SGD|Low: $533 SGD|High: $2,471 SGD|Avg: $856 SGD|-6.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 8$544 SGD
Retailer 9$590 SGD
Retailer 2$634 SGD
Retailer 3$650 SGD
Retailer 12$659 SGD
Retailer 5$680 SGD
Retailer 10$680 SGD
Retailer 11$691 SGD
Retailer 6$723 SGD
Retailer 7$734 SGD
Retailer 4$969 SGD
NZ Jewellers$2,312 SGD

35 data points across 12 retailers

12 retailers$544 SGD to $2,312 SGD

A
Cheapest Retailer
-
$544 SGD
$425 USD
Final sale: no returns
A
Retailer 2
-
$590 SGD
$461 USD
View
A
Retailer 3
-
$634 SGD
$496 USD
View
A
Retailer 4
-
$650 SGD
$508 USD
View
A
Retailer 5
-
$659 SGD
View
A
Retailer 6
-
$680 SGD
$532 USD
View
A
Retailer 7
-
$680 SGD
$532 USD
View
A
Retailer 8
-
$691 SGD
$540 USD
View
A
Retailer 9
-
$723 SGD
£445 GBP
View
A
Retailer 10
-
$734 SGD
£452 GBP
View
Retailer 11
-
$969 SGD
A$1,166 AUD
View
Price last confirmed 30 days ago
Most Expensive
B
NZ Jewellers
88376718-b8b2-4f68-9965-981372ec3c26 · Oct 30
$2,312 SGD
$1,808 USD
View
11 more retailers have this diamond
Prices start from $544 SGDSave up to $1,769 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
$544 SGD