Marquise|Natural|GIA

0.51ct I IF Marquise Natural Diamond

ID • I/IF • GIA 6545669394

Certificate GIA 6545669394

Diamond specifications and retailer prices

From £486 GBP
$652 USD
As of November 1, 2026
Save £1,037 GBP (68%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,522 GBP 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545669394. Listed at 13 retailers as of October 30, 2026, with prices from £486 to £1,522, a £1,037 spread on the same certified stone. NZ Jewellers lists it at £1,522. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.16°
Pavilion angle40.39°
OriginNatural
Grading LabGIA
CertificateGIA 6545669394
Dimensions4.12 × 8.25 × 2.59 mm
L/W Ratio2.00
Top View
4.12 mm8.25 mm0.51 ctI / IF
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545669394
Side View
Table 60.0%Crown 38.16°Girdle: Slightly ThickPavilion 40.39°Culet: NoneDepth 62.9%

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: £1,522 GBP|Low: £486 GBP|High: £1,581 GBP|Avg: £699 GBP|-3.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 6£486 GBP
Retailer 4£495 GBP
Retailer 13£507 GBP
Retailer 12£513 GBP
Retailer 3£514 GBP
Retailer 7£548 GBP
Retailer 11£560 GBP
Retailer 10£581 GBP
Retailer 2£584 GBP
Retailer 8£598 GBP
Retailer 5£758 GBP
Retailer 9£1,121 GBP
NZ Jewellers£1,522 GBP

35 data points across 13 retailers

13 retailers£486 GBP to £1,522 GBP

A
Cheapest Retailer
-
£486 GBP
$652 USD
A
Retailer 2
-
£495 GBP
$664 USD
View
A
Retailer 3
-
£507 GBP
$680 USD
View
A
Retailer 4
-
£513 GBP
$689 USD
View
A
Retailer 5
-
£514 GBP
$690 USD
View
A
Retailer 6
-
£548 GBP
View
A
Retailer 7
-
£560 GBP
$752 USD
View
A
Retailer 8
-
£581 GBP
$780 USD
View
A
Retailer 9
-
£584 GBP
$784 USD
View
A
Retailer 10
-
£598 GBP
View
Retailer 11
-
£758 GBP
A$1,565 AUD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
£1,121 GBP
View
Most Expensive
B
NZ Jewellers
a3bd01fd-366e-4e87-8313-d088c73557f9 · Oct 30
£1,522 GBP
$2,043 USD
View
12 more retailers have this diamond
Prices start from £486 GBPSave up to £1,037 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
£486 GBP