CaratHunter
Plans
Marquise|Natural|GIA

0.51ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 7551413826

Certificate GIA 7551413826

Diamond specifications and retailer prices

From $601 NZD
₹32,182 INR
As of November 2, 2026
Save $1,271 NZD (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,872 NZD at NZ Jewellers · As of October 6, 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 J 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 7551413826. Listed at 9 retailers as of November 2, 2026, with a 212% 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7551413826
Dimensions7.66 × 4.15 × 2.68 mm
L/W Ratio1.85
Girdle conditionSlightly Thick to Very Thick
Key to symbols
Cloud, Crystal
Top View
7.66 mm4.15 mm0.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7551413826
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.5%

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: $601 NZD|Low: $599 NZD|High: $2,135 NZD|Avg: $1,076 NZD|-12.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 1$601 NZD
Retailer 4$682 NZD
Retailer 6$855 NZD
Retailer 5$869 NZD
Retailer 2$1,319 NZD
Retailer 3$1,871 NZD

46 data points across 6 retailers

9 retailers$601 NZD to $1,871 NZD

A
Cheapest Retailer
-
$601 NZD
₹32,182 INR
A
Retailer 2
-
$682 NZD
HK$3,000 HKD
View
Retailer 3
-
$855 NZD
SGD 650 SGD
View
Price last confirmed 8 days ago
Retailer 4
-
$869 NZD
$489 USD
View
Price last confirmed 13 days ago
Retailer 5
-
$892 NZD
$502 USD
View
Price last confirmed 32 days ago
Retailer 6
-
$915 NZD
$515 USD
View
Price last confirmed 26 days ago
B+
Retailer 7
-
$1,319 NZD
£584 GBP
View
B
Retailer 8
-
$1,871 NZD
£829 GBP
View
Most Expensive
NZ Jewellers
505a9c11-f64e-4cd1-b033-5cfdd55d25aa · Oct 6
$2,872 NZD
$1,616 USD
View
Price last confirmed 27 days ago
8 more retailers have this diamond
Prices start from $601 NZDSave up to $1,271 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
$601 NZD