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Marquise|Natural|GIA

0.51ct I IF Marquise Natural Diamond

EX • I/IF • GIA 6542938952

Certificate GIA 6542938952

Diamond specifications and retailer prices

From £420 GBP
HK$4,400 HKD
As of November 1, 2026
Save £763 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,890 GBP at NZ Jewellers · As of September 25, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542938952. Listed at 19 retailers as of October 31, 2026, with a 181% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

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

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Pavilion angle39.6°
OriginNatural
Grading LabGIA
CertificateGIA 6542938952
Dimensions7.62 × 4.10 × 2.69 mm
L/W Ratio1.86
Top View
7.62 mm4.10 mm0.51 ctI / IF
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542938952
Side View
Table 60.0%CrownGirdle: STK-VTKPavilion 39.6°Culet: NoneDepth 65.6%

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: £775 GBP|Low: £420 GBP|High: £1,194 GBP|Avg: £749 GBP|-2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 11£420 GBP
Retailer 14£530 GBP
Retailer 15£534 GBP
Retailer 13£560 GBP
Retailer 7£594 GBP
Retailer 17£594 GBP
Retailer 10£604 GBP
Retailer 3£709 GBP
Retailer 4£716 GBP
Retailer 8£734 GBP
Retailer 1£775 GBP
Retailer 12£785 GBP
Retailer 2£850 GBP
Retailer 9£898 GBP
Retailer 16£908 GBP
Retailer 5£1,083 GBP
Retailer 6£1,183 GBP

27 data points across 17 retailers

19 retailers£420 GBP to £1,183 GBP

A
Cheapest Retailer
-
£420 GBP
HK$4,400 HKD
A
Retailer 2
-
£530 GBP
$710 USD
View
A
Retailer 3
-
£534 GBP
$716 USD
View
Final sale: no returns
A
Retailer 4
-
£560 GBP
€715 EUR
View
Retailer 5
-
£594 GBP
SGD 1,075 SGD
View
Price last confirmed 10 days ago
A
Retailer 6
-
£594 GBP
$796 USD
View
A
Retailer 7
-
£604 GBP
View
A
Retailer 8
-
£709 GBP
$950 USD
View
B+
Retailer 9
-
£716 GBP
$960 USD
View
B+
Retailer 10
-
£734 GBP
$983 USD
View
B+
Retailer 11
-
£775 GBP
€989 EUR
View
B+
Retailer 12
-
£785 GBP
$1,052 USD
View
B+
Retailer 13
-
£814 GBP
A$1,678 AUD
View
Retailer 14
-
£850 GBP
$1,139 USD
View
Price last confirmed 9 days ago
Retailer 15
-
£898 GBP
A$1,851 AUD
View
Price last confirmed 28 days ago
B+
Retailer 16
-
£908 GBP
ZAR 19,655 ZAR
View
B+
Retailer 17
-
£1,083 GBP
View
B
Retailer 18
-
£1,183 GBP
View
Most Expensive
NZ Jewellers
9f9df035-b8c5-4539-99ae-50f8749fb01b · Sep 25
£1,890 GBP
$2,533 USD
View
Price last confirmed 38 days ago
18 more retailers have this diamond
Prices start from £420 GBPSave up to £763 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
£420 GBP