Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 5516455267

Certificate GIA 5516455267

Diamond specifications and retailer prices

From £444 GBP
₹56,610 INR
As of October 31, 2026
Save £1,040 GBP (70%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,869 GBP at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5516455267. Listed at 20 retailers as of October 28, 2026, with a 234% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5516455267
Dimensions6.77 × 4.41 × 2.68 mm
L/W Ratio1.54
Top View
6.77 mm4.41 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5516455267
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 60.8%

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: Oct 31
Current: £444 GBP|Low: £418 GBP|High: £1,488 GBP|Avg: £751 GBP|-1.3%
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
October 31, 2026
Retailer 1£444 GBP
Retailer 4£531 GBP
Retailer 12£550 GBP
Retailer 2£596 GBP
Retailer 5£605 GBP
Retailer 14£687 GBP
Retailer 6£695 GBP
Retailer 7£717 GBP
Retailer 3£720 GBP
Retailer 8£843 GBP
Retailer 13£896 GBP
Retailer 9£920 GBP
Retailer 11£1,093 GBP
Retailer 10£1,483 GBP

32 data points across 14 retailers

20 retailers£444 GBP to £1,483 GBP

A
Cheapest Retailer
-
£444 GBP
₹56,610 INR
A
Retailer 2
-
£531 GBP
$712 USD
View
B+
Retailer 3
-
£550 GBP
$737 USD
View
Final sale: no returns
B+
Retailer 4
-
£596 GBP
$798 USD
View
B+
Retailer 5
-
£596 GBP
$798 USD
View
B+
Retailer 6
-
£605 GBP
$810 USD
View
B+
Retailer 7
-
£619 GBP
$829 USD
View
B+
Retailer 8
-
£655 GBP
$877 USD
View
B+
Retailer 9
-
£687 GBP
$921 USD
View
B+
Retailer 10
-
£695 GBP
$931 USD
View
B+
Retailer 11
-
£717 GBP
View
B+
Retailer 12
-
£720 GBP
$965 USD
View
Retailer 13
-
£740 GBP
View
Price last confirmed 31 days ago
B+
Retailer 14
-
£803 GBP
$1,076 USD
View
B+
Retailer 15
-
£843 GBP
€1,076 EUR
View
Retailer 16
-
£896 GBP
A$1,847 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
£920 GBP
ZAR 19,909 ZAR
View
B
Retailer 18
-
£1,093 GBP
View
B
Retailer 19
-
£1,483 GBP
View
Most Expensive
NZ Jewellers
806b45fa-fdfa-4fed-8ef1-fa50bf360653 · Oct 30
£1,869 GBP
$2,504 USD
View
Price under review
19 more retailers have this diamond
Prices start from £444 GBPSave up to £1,040 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
£444 GBP