Oval|Natural|GIA

0.51ct D SI2 Oval Natural Diamond

EX • D/SI2 • GIA 6515880819

Certificate GIA 6515880819

Diamond specifications and retailer prices

From £415 GBP
As of November 6, 2026
Save £1,351 GBP (77%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,765 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6515880819. Listed at 22 retailers as of November 5, 2026, with prices from £415 to £1,765, a £1,351 spread on the same certified stone. NZ Jewellers lists it at £1,765. 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
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6515880819
Dimensions6.06 × 4.38 × 2.83 mm
L/W Ratio1.38
Top View
6.06 mm4.38 mm0.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6515880819
Side View
Table 56.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 64.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £415 GBP|Low: £359 GBP|High: £1,651 GBP|Avg: £663 GBP|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 1£415 GBP
Retailer 8£519 GBP
Retailer 7£560 GBP
Retailer 5£563 GBP
Retailer 6£572 GBP
Retailer 3£669 GBP
Retailer 2£793 GBP
Retailer 4£1,031 GBP

41 data points across 8 retailers

22 retailers£415 GBP to £1,765 GBP

A
Cheapest Retailer
-
£415 GBP
Retailer 2
-
£430 GBP
View
Price last confirmed 63 days ago
A
Retailer 3
-
£519 GBP
View
Final sale: no returns
Retailer 4
-
£560 GBP
View
Price last confirmed 19 days ago
Retailer 5
-
£563 GBP
View
Price last confirmed 21 days ago
Retailer 6
-
£563 GBP
View
Price last confirmed 45 days ago
Retailer 7
-
£563 GBP
View
Price last confirmed 17 days ago
B+
Retailer 8
-
£563 GBP
View
A
Retailer 9
-
£572 GBP
View
Retailer 10
-
£650 GBP
View
Price last confirmed 67 days ago
B+
Retailer 11
-
£650 GBP
View
B+
Retailer 12
-
£650 GBP
View
Retailer 13
-
£650 GBP
View
Price last confirmed 45 days ago
B+
Retailer 14
-
£650 GBP
View
B+
Retailer 15
-
£662 GBP
View
B+
Retailer 16
-
£669 GBP
View
B+
Retailer 17
-
£793 GBP
View
B
Retailer 18
-
£1,031 GBP
View
Retailer 19
-
£1,765 GBP
View
Price last confirmed 68 days ago
B
Retailer 20
-
£1,765 GBP
View
Retailer 21
-
£1,765 GBP
View
Price last confirmed 48 days ago
Most Expensive
B
NZ Jewellers
ac2051ab-ac8c-4390-b85d-b8a5644c3624 · Nov 5
£1,765 GBP
$2,363 USD
View
21 more retailers have this diamond
Prices start from £415 GBPSave up to £1,351 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 Oval
£415 GBP