CaratHunter
Plans
Heart|Natural|IGI

1.23ct G VVS1 Heart Natural Diamond

VG • G/VVS1 • IGI 851618603

Shape and cutting style on the report: Heart brilliant

Certificate IGI 851618603

Diamond specifications and retailer prices

From £2,387 GBP
As of November 5, 2026
Save £3,199 GBP (57%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £5,586 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.23ct natural heart diamond

This 1.23ct natural heart sits in the classic one-carat band, graded G colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI 851618603. Listed at 12 retailers as of November 5, 2026, with prices from £2,387 to £5,586, a £3,199 spread on the same certified stone. NZ Jewellers lists it at £5,586. 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

1.23
Carat
G
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle39.5°
OriginNatural
Grading LabIGI
CertificateIGI 851618603
Dimensions6.59 × 7.26 × 4.43 mm
L/W Ratio1.10
Girdle conditionFaceted
Top View
6.59 mm7.26 mm1.23 ctG / VVS1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 851618603
Side View
Table 54.0%Crown 33.1°Girdle: STK-THKPavilion 39.5°CuletDepth 61.0%

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 5
Current: £5,586 GBP|Low: £2,387 GBP|High: £5,586 GBP|Avg: £3,356 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 6£2,387 GBP
Retailer 12£2,597 GBP
Retailer 8£2,849 GBP
Retailer 5£2,918 GBP
Retailer 10£2,959 GBP
Retailer 7£3,206 GBP
Retailer 11£3,206 GBP
Retailer 2£3,340 GBP
Retailer 4£3,391 GBP
Retailer 3£3,699 GBP
Retailer 9£5,092 GBP
NZ Jewellers£5,586 GBP

4 data points across 12 retailers

12 retailers£2,387 GBP to £5,586 GBP

A
Cheapest Retailer
-
£2,387 GBP
A
Retailer 2
-
£2,597 GBP
View
B+
Retailer 3
-
£2,849 GBP
View
B+
Retailer 4
-
£2,918 GBP
View
B+
Retailer 5
-
£2,959 GBP
View
Final sale: no returns
B+
Retailer 6
-
£3,206 GBP
View
B+
Retailer 7
-
£3,206 GBP
View
B+
Retailer 8
-
£3,340 GBP
View
B+
Retailer 9
-
£3,391 GBP
View
B
Retailer 10
-
£3,699 GBP
View
B
Retailer 11
-
£5,092 GBP
View
Most Expensive
B
NZ Jewellers
d3ccc593-a6fa-4142-850b-d3d27c1aa763 · Nov 5
£5,586 GBP
$7,518 USD
View
11 more retailers have this diamond
Prices start from £2,387 GBPSave up to £3,199 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
1.23ct Heart
£2,387 GBP