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Radiant|Natural|IGI

0.51ct D SI2 Radiant Natural Diamond

EX • D/SI2 • IGI 692555294

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI 692555294

Diamond specifications and retailer prices

From £318 GBP
₹40,604 INR
As of October 30, 2026
Save £1,024 GBP (76%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,342 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 692555294. Listed at 7 retailers as of October 30, 2026, with prices from £318 to £1,342, a £1,024 spread on the same certified stone. NZ Jewellers lists it at £1,342. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle42.6°
Pavilion angle32.4°
OriginNatural
Grading LabIGI
CertificateIGI 692555294
Dimensions5.25 × 4.08 × 2.72 mm
L/W Ratio1.29
Culet sizePointed
Top View
5.25 mm4.08 mm0.51 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 692555294
Side View
Table 66.0%Crown 42.6°Girdle: MED-STKPavilion 32.4°Culet: NoneDepth 66.7%

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 30
Current: £1,342 GBP|Low: £316 GBP|High: £1,382 GBP|Avg: £687 GBP|-2.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 3£318 GBP
Retailer 8£487 GBP
Retailer 7£526 GBP
Retailer 5£536 GBP
Retailer 6£609 GBP
Retailer 2£634 GBP
Retailer 4£993 GBP
NZ Jewellers£1,342 GBP

46 data points across 8 retailers

7 retailers£318 GBP to £1,342 GBP

A
Cheapest Retailer
-
£318 GBP
₹40,604 INR
B+
Retailer 2
-
£526 GBP
$705 USD
View
A
Retailer 3
-
£536 GBP
View
B+
Retailer 4
-
£609 GBP
$816 USD
View
B+
Retailer 5
-
£634 GBP
€809 EUR
View
B
Retailer 6
-
£993 GBP
View
Most Expensive
B
NZ Jewellers
eb0ea19e-556b-4bfb-8a67-c25abd743aa2 · Oct 30
£1,342 GBP
$1,798 USD
View
6 more retailers have this diamond
Prices start from £318 GBPSave up to £1,024 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 Radiant
£318 GBP