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Heart|Natural|IGI

0.51ct I SI2 Heart Natural Diamond

VG • I/SI2 • IGI 692555256

Shape and cutting style on the report: Heart brilliant

Certificate IGI 692555256

Diamond specifications and retailer prices

From £247 GBP
₹31,517 INR
As of November 2, 2026
Save £533 GBP (68%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,294 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 692555256. Listed at 8 retailers as of November 1, 2026, with a 216% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle44°
Pavilion angle42.7°
OriginNatural
Grading LabIGI
CertificateIGI 692555256
Dimensions4.79 × 5.29 × 3.24 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizeNone
Top View
4.79 mm5.29 mm0.51 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI 692555256
Side View
Table 61.0%Crown 44°Girdle: STK-VTKPavilion 42.7°Culet: NoneDepth 61.2%

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 2
Current: £1,294 GBP|Low: £246 GBP|High: £1,301 GBP|Avg: £581 GBP|-0.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2£247 GBP
Retailer 3£403 GBP
Retailer 7£435 GBP
Retailer 6£473 GBP
Retailer 4£511 GBP
Retailer 5£780 GBP
NZ Jewellers£1,294 GBP

39 data points across 7 retailers

8 retailers£247 GBP to £780 GBP

A
Cheapest Retailer
-
£247 GBP
₹31,517 INR
B+
Retailer 2
-
£403 GBP
View
B
Retailer 3
-
£435 GBP
$583 USD
View
B
Retailer 4
-
£473 GBP
$634 USD
View
B
Retailer 5
-
£511 GBP
€652 EUR
View
C
Retailer 6
-
£780 GBP
View
Retailer 7
-
£1,294 GBP
$1,734 USD
View
Price under review
Most Expensive
NZ Jewellers
5bb2a694-0ad7-4da9-9867-c169d9d8d3a7 · Oct 27
£1,294 GBP
$1,734 USD
View
Price under review
7 more retailers have this diamond
Prices start from £247 GBPSave up to £533 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 Heart
£247 GBP