CaratHunter
Plans
Round|Natural|GIA

5.03ct H SI2 Round Natural Diamond

ID • H/SI2 • GIA 503

Certificate GIA 503

Diamond specifications and retailer prices

From £62,770 GBP
$84,105 USD
As of October 31, 2026
Save £9,972 GBP (14%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £72,743 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 5.03ct natural round diamond

This 5.03ct natural round sits in the over five carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 4 retailers as of October 31, 2026, with prices from £62,770 to £72,743, a £9,972 spread on the same certified stone. Blue Nile lists it at £72,743. 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

5.03
Carat
H
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 503
Dimensions11.02 × 11.10 × 6.63 mm
L/W Ratio1.01
Top View
11.02 mm11.10 mm5.03 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 503
Side View
Table 61.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 59.9%

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: Oct 31
Current: £72,743 GBP|Low: £62,181 GBP|High: £72,743 GBP|Avg: £66,790 GBP
Blue Nile
Retailer 2
Retailer 3
October 23, 2026
Retailer 2£62,770 GBP
Retailer 3£65,968 GBP
Blue Nile£72,743 GBP

6 data points across 3 retailers

4 retailers£62,770 GBP to £72,743 GBP

B+
Cheapest Retailer
-
£62,770 GBP
$84,105 USD
Retailer 2
-
£65,687 GBP
$88,014 USD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
£65,968 GBP
$88,390 USD
View
Most Expensive
B
Blue Nile
15542127 · Oct 31
£72,743 GBP
$97,467 USD
View
3 more retailers have this diamond
Prices start from £62,770 GBPSave up to £9,972 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+
5.03ct Round
£62,770 GBP