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Oval|Natural|GIA

0.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6515090345

Certificate GIA 6515090345

Diamond specifications and retailer prices

From £615 GBP
$824 USD
As of November 2, 2026
Save £739 GBP (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,354 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded G 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 6515090345. Listed at 21 retailers as of October 29, 2026, with prices from £615 to £1,354, a £739 spread on the same certified stone. MOH London lists it at £1,354. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40.03°
Pavilion angle39.22°
OriginNatural
Grading LabGIA
CertificateGIA 6515090345
Dimensions6.18 × 4.48 × 2.77 mm
L/W Ratio1.38
Top View
6.18 mm4.48 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6515090345
Side View
Table 58.0%Crown 40.03°Girdle: MED-THKPavilion 39.22°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £1,354 GBP|Low: £513 GBP|High: £1,364 GBP|Avg: £840 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9£615 GBP
Retailer 3£654 GBP
Retailer 7£657 GBP
Retailer 8£666 GBP
Retailer 10£731 GBP
Retailer 2£735 GBP
Retailer 6£784 GBP
Retailer 4£1,034 GBP
Retailer 11£1,098 GBP
Retailer 5£1,136 GBP
MOH London£1,354 GBP

32 data points across 11 retailers

21 retailers£615 GBP to £1,354 GBP

B+
Cheapest Retailer
-
£615 GBP
$824 USD
Final sale: no returns
B+
Retailer 2
-
£654 GBP
$876 USD
View
B+
Retailer 3
-
£657 GBP
$880 USD
View
Retailer 4
-
£666 GBP
$893 USD
View
Price last confirmed 34 days ago
B+
Retailer 5
-
£666 GBP
$893 USD
View
B+
Retailer 6
-
£674 GBP
$903 USD
View
B+
Retailer 7
-
£731 GBP
$980 USD
View
B+
Retailer 8
-
£735 GBP
View
B+
Retailer 9
-
£742 GBP
$994 USD
View
Retailer 10
-
£769 GBP
$1,030 USD
View
Price last confirmed 33 days ago
B
Retailer 11
-
£769 GBP
$1,030 USD
View
B
Retailer 12
-
£784 GBP
$1,050 USD
View
B
Retailer 13
-
£784 GBP
$1,050 USD
View
B
Retailer 14
-
£784 GBP
$1,050 USD
View
B
Retailer 15
-
£813 GBP
$1,090 USD
View
B
Retailer 16
-
£1,034 GBP
€1,320 EUR
View
Retailer 17
-
£1,098 GBP
A$2,263 AUD
View
Price last confirmed 33 days ago
B
Retailer 18
-
£1,136 GBP
ZAR 24,580 ZAR
View
Most Expensive
B
MOH London
3B8888A20 · Oct 29
£1,354 GBP
View
18 more retailers have this diamond
Prices start from £615 GBPSave up to £739 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.

B+
0.51ct Oval
£615 GBP