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Marquise|Natural|GIA

0.51ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 1323584591

Certificate GIA 1323584591

Diamond specifications and retailer prices

From £388 GBP
$521 USD
As of November 2, 2026
Save £931 GBP (71%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,320 GBP 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1323584591. Listed at 9 retailers as of November 2, 2026, with prices from £388 to £1,320, a £931 spread on the same certified stone. NZ Jewellers lists it at £1,320. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1323584591
Dimensions7.29 × 4.28 × 2.69 mm
L/W Ratio1.70
Culet sizeNone
Key to symbols
Crystal
Top View
7.29 mm4.28 mm0.51 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1323584591
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.8%

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: £1,320 GBP|Low: £357 GBP|High: £1,347 GBP|Avg: £666 GBP|-2.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 8£388 GBP
Retailer 3£432 GBP
Retailer 10£476 GBP
Retailer 2£516 GBP
Retailer 5£566 GBP
Retailer 9£636 GBP
Retailer 6£650 GBP
Retailer 7£700 GBP
Retailer 4£972 GBP
NZ Jewellers£1,320 GBP

44 data points across 10 retailers

9 retailers£388 GBP to £1,320 GBP

A
Cheapest Retailer
-
£388 GBP
$521 USD
Final sale: no returns
B+
Retailer 2
-
£432 GBP
$580 USD
View
B
Retailer 3
-
£516 GBP
View
B
Retailer 4
-
£566 GBP
$760 USD
View
Retailer 5
-
£636 GBP
A$1,312 AUD
View
Price last confirmed 30 days ago
B
Retailer 6
-
£650 GBP
ZAR 14,084 ZAR
View
B
Retailer 7
-
£700 GBP
$940 USD
View
C
Retailer 8
-
£972 GBP
View
Most Expensive
C
NZ Jewellers
1ecc8406-127a-40bc-af56-d78a0c727c9b · Nov 3
£1,320 GBP
$1,771 USD
View
8 more retailers have this diamond
Prices start from £388 GBPSave up to £931 GBP

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
£388 GBP