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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 $978 NZD
HK$4,300 HKD
As of November 1, 2026
Save $1,701 NZD (63%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,638 NZD 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 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: $1,416 NZD|Low: $1,070 NZD|High: $2,711 NZD|Avg: $1,665 NZD|+5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 2026
Retailer 6$1,070 NZD
Retailer 8$1,376 NZD
Retailer 1$1,416 NZD
Retailer 5$1,493 NZD
Retailer 3$1,555 NZD
Retailer 9$1,672 NZD
Retailer 7$1,745 NZD
Retailer 4$1,791 NZD
Retailer 2$2,679 NZD

44 data points across 9 retailers

19 retailers$978 NZD to $2,679 NZD

A
Cheapest Retailer
-
$978 NZD
HK$4,300 HKD
A
Retailer 2
-
$1,070 NZD
$602 USD
View
Final sale: no returns
B+
Retailer 3
-
$1,161 NZD
$653 USD
View
B+
Retailer 4
-
$1,161 NZD
$653 USD
View
B+
Retailer 5
-
$1,205 NZD
$678 USD
View
B+
Retailer 6
-
$1,215 NZD
SGD 924 SGD
View
B+
Retailer 7
-
$1,338 NZD
$753 USD
View
B+
Retailer 8
-
$1,376 NZD
$774 USD
View
B+
Retailer 9
-
$1,395 NZD
$785 USD
View
B+
Retailer 10
-
$1,416 NZD
£627 GBP
View
B
Retailer 11
-
$1,493 NZD
$840 USD
View
B
Retailer 12
-
$1,555 NZD
€833 EUR
View
B+
Retailer 13
-
$1,596 NZD
$898 USD
View
Retailer 14
-
$1,626 NZD
$915 USD
View
Price last confirmed 7 days ago
B
Retailer 15
-
$1,672 NZD
$941 USD
View
Retailer 16
-
$1,745 NZD
A$1,510 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
$1,791 NZD
ZAR 16,278 ZAR
View
B
Retailer 18
-
$2,679 NZD
£1,187 GBP
View
Most Expensive
NZ Jewellers
8fc8395c-49aa-4154-9434-046bd2f4a0ba · Nov 3
$3,638 NZD
$2,047 USD
View
Price under review
18 more retailers have this diamond
Prices start from $978 NZDSave up to $1,701 NZD

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
$978 NZD