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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 1535044773

Certificate GIA 1535044773

Diamond specifications and retailer prices

From £302 GBP
As of November 6, 2026
Save £676 GBP (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,331 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1535044773. Listed at 15 retailers as of November 4, 2026, with a 224% 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1535044773
Dimensions5.11 × 5.09 × 3.19 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Cloud
Top View
5.11 mm5.09 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1535044773
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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 6
Current: £302 GBP|Low: £302 GBP|High: £991 GBP|Avg: £527 GBP|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1£302 GBP
Retailer 9£392 GBP
Retailer 6£427 GBP
Retailer 3£435 GBP
Retailer 8£490 GBP
Retailer 2£504 GBP
Retailer 4£512 GBP
Retailer 5£553 GBP
Retailer 7£978 GBP

29 data points across 9 retailers

15 retailers£302 GBP to £978 GBP

A
Cheapest Retailer
-
£302 GBP
A
Retailer 2
-
£351 GBP
View
A
Retailer 3
-
£392 GBP
View
Final sale: no returns
A
Retailer 4
-
£427 GBP
View
A
Retailer 5
-
£435 GBP
View
A
Retailer 6
-
£457 GBP
View
Retailer 7
-
£490 GBP
View
Price last confirmed 10 days ago
B+
Retailer 8
-
£490 GBP
View
B+
Retailer 9
-
£504 GBP
View
B+
Retailer 10
-
£506 GBP
View
B+
Retailer 11
-
£512 GBP
View
B+
Retailer 12
-
£553 GBP
View
B
Retailer 13
-
£657 GBP
View
B
Retailer 14
-
£978 GBP
View
Most Expensive
NZ Jewellers
fb916022-03e4-4531-afed-4b3324334911 · Oct 27
£1,331 GBP
$1,791 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from £302 GBPSave up to £676 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 Round
£302 GBP