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Round|Natural|IGI

0.51ct L SI2 Round Natural Diamond

EX • L/SI2 • IGI 638418320

Shape and cutting style on the report: Round brilliant

Certificate IGI 638418320

Diamond specifications and retailer prices

From £201 GBP
As of November 5, 2026
Save £709 GBP (78%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £910 GBP at NZ Jewellers · As of November 4, 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 L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 638418320. Listed at 9 retailers as of November 4, 2026, with prices from £201 to £910, a £709 spread on the same certified stone. NZ Jewellers lists it at £910. 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
L
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle36.2°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 638418320
Dimensions5.07 × 5.10 × 3.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
5.07 mm5.10 mm0.51 ctL / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateIGI 638418320
Side View
Table 63.0%Crown 36.2°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.8%

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 5
Current: £910 GBP|Low: £201 GBP|High: £910 GBP|Avg: £330 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7£201 GBP
Retailer 5£211 GBP
Retailer 9£216 GBP
Retailer 4£224 GBP
Retailer 8£270 GBP
Retailer 6£273 GBP
Retailer 11£297 GBP
Retailer 3£302 GBP
Retailer 2£344 GBP
Retailer 10£352 GBP
NZ Jewellers£910 GBP

15 data points across 11 retailers

9 retailers£201 GBP to £910 GBP

A
Cheapest Retailer
-
£201 GBP
Retailer 2
-
£216 GBP
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£224 GBP
View
Retailer 4
-
£266 GBP
View
Price last confirmed 14 days ago
B+
Retailer 5
-
£270 GBP
View
B+
Retailer 6
-
£273 GBP
View
B+
Retailer 7
-
£297 GBP
View
B+
Retailer 8
-
£344 GBP
View
Most Expensive
C
NZ Jewellers
8a4e0068-c8d5-44ca-8bd6-925b1c914e4b · Nov 4
£910 GBP
$1,225 USD
View
8 more retailers have this diamond
Prices start from £201 GBPSave up to £709 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
£201 GBP