CaratHunter
Plans
Heart|Lab Grown|IGI

1.73ct G SI1 Heart Lab Grown Diamond

ID • G/SI1 • IGI LG539229329

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG539229329

Diamond specifications and retailer prices

From £1,001 GBP
As of November 6, 2026
Save £1,162 GBP (54%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,888 GBP at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

About this 1.73ct lab-grown heart diamond

This 1.73ct lab-grown heart sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG539229329 or 539229329. Listed at 12 retailers as of November 6, 2026, with a 116% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.73
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG539229329
Dimensions8.18 × 7.47 × 4.85 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.18 mm7.47 mm1.73 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG539229329
Side View
Table 62.5%Crown 36.3°Girdle: STK-VTKPavilion 38.7°Culet: NoneDepth 59.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,163 GBP|Low: £1,001 GBP|High: £4,458 GBP|Avg: £2,123 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£1,001 GBP
Retailer 5£1,328 GBP
Retailer 8£1,486 GBP
Retailer 6£1,541 GBP
Retailer 9£1,666 GBP
Retailer 1£2,163 GBP
Retailer 7£2,417 GBP
Retailer 4£2,591 GBP
Retailer 2£4,387 GBP

45 data points across 9 retailers

12 retailers£1,001 GBP to £2,163 GBP

B
Cheapest Retailer
-
£1,001 GBP
B
Retailer 2
-
£1,328 GBP
View
B
Retailer 3
-
£1,445 GBP
View
B
Retailer 4
-
£1,486 GBP
View
Final sale: no returns
B
Retailer 5
-
£1,541 GBP
View
Retailer 6
-
£1,541 GBP
View
Price last confirmed 25 days ago
B
Retailer 7
-
£1,666 GBP
View
B
Retailer 8
-
£2,163 GBP
View
Retailer 9
-
£2,417 GBP
View
Price under review
Retailer 10
-
£2,591 GBP
View
Price under review
Most Expensive
NZ Jewellers
62f363ad-9986-41de-940e-37d6d1351228 · Nov 6
£2,888 GBP
$3,865 USD
View
Price under review
10 more retailers have this diamond
Prices start from £1,001 GBPSave up to £1,162 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
1.73ct Heart
£1,001 GBP