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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2547681359

Certificate GIA 2547681359

Diamond specifications and retailer prices

From $704 SGD
HK$4,300 HKD
As of November 1, 2026
Save $1,224 SGD (63%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,618 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 2547681359. Listed at 19 retailers as of November 1, 2026, with a 174% 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

0.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2547681359
Dimensions8.18 × 4.16 × 2.67 mm
L/W Ratio1.97
Top View
8.18 mm4.16 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2547681359
Side View
Table 59.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 64.3%

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: $1,928 SGD|Low: $770 SGD|High: $1,951 SGD|Avg: $1,198 SGD|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$770 SGD
Retailer 8$990 SGD
Retailer 3$1,020 SGD
Retailer 5$1,074 SGD
Retailer 2$1,119 SGD
Retailer 9$1,203 SGD
Retailer 7$1,255 SGD
Retailer 4$1,289 SGD
Retailer 1$1,928 SGD

43 data points across 9 retailers

19 retailers$704 SGD to $1,928 SGD

A
Cheapest Retailer
-
$704 SGD
HK$4,300 HKD
A
Retailer 2
-
$770 SGD
$602 USD
View
Final sale: no returns
B+
Retailer 3
-
$835 SGD
$653 USD
View
B+
Retailer 4
-
$835 SGD
$653 USD
View
B+
Retailer 5
-
$867 SGD
$678 USD
View
B+
Retailer 6
-
$874 SGD
View
B+
Retailer 7
-
$963 SGD
$753 USD
View
B+
Retailer 8
-
$990 SGD
$774 USD
View
B+
Retailer 9
-
$1,004 SGD
$785 USD
View
B+
Retailer 10
-
$1,020 SGD
£628 GBP
View
B
Retailer 11
-
$1,074 SGD
$840 USD
View
B
Retailer 12
-
$1,119 SGD
€833 EUR
View
B+
Retailer 13
-
$1,149 SGD
$898 USD
View
B
Retailer 14
-
$1,170 SGD
$915 USD
View
Price last confirmed 7 days ago
B
Retailer 15
-
$1,203 SGD
$941 USD
View
Retailer 16
-
$1,255 SGD
A$1,510 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
$1,289 SGD
ZAR 16,278 ZAR
View
B
Retailer 18
-
$1,928 SGD
£1,187 GBP
View
Most Expensive
NZ Jewellers
8fc8395c-49aa-4154-9434-046bd2f4a0ba · Oct 30
$2,618 SGD
$2,047 USD
View
Price under review
18 more retailers have this diamond
Prices start from $704 SGDSave up to $1,224 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
$704 SGD