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Heart|Lab Grown|IGI

1.80ct I SI1 Heart Lab Grown Diamond

VG • I/SI1 • IGI LG425067609

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG425067609

Diamond specifications and retailer prices

From £1,156 GBP
$1,549 USD
As of October 27, 2026
Save £1,358 GBP (54%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,851 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.8ct lab-grown heart diamond

This 1.8ct lab-grown heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG425067609 or 425067609. Listed at 11 retailers as of October 27, 2026, with a 117% 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

1.80
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.6°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425067609
Dimensions8.71 × 7.28 × 4.81 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
8.71 mm7.28 mm1.80 ctI / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG425067609
Side View
Table 64.0%Crown 32.6°Girdle: STK-THKPavilion 40°Culet: NoneDepth 55.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £3,851 GBP|Low: £1,110 GBP|High: £3,882 GBP|Avg: £2,083 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 18, 2026
Retailer 4£1,156 GBP
Retailer 5£1,224 GBP
Retailer 8£1,295 GBP
Retailer 6£1,341 GBP
Retailer 9£1,470 GBP
Retailer 10£1,817 GBP
Retailer 3£1,891 GBP
Retailer 7£2,111 GBP
Retailer 2£2,372 GBP
Retailer 11£3,841 GBP
MOH London£3,851 GBP

12 data points across 11 retailers

11 retailers£1,156 GBP to £2,514 GBP

B+
Cheapest Retailer
-
£1,156 GBP
$1,549 USD
B+
Retailer 2
-
£1,224 GBP
$1,640 USD
View
B
Retailer 3
-
£1,258 GBP
$1,686 USD
View
B
Retailer 4
-
£1,295 GBP
$1,735 USD
View
Final sale: no returns
B
Retailer 5
-
£1,341 GBP
$1,797 USD
View
Retailer 6
-
£1,341 GBP
$1,797 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
£1,470 GBP
$1,970 USD
View
B
Retailer 8
-
£2,111 GBP
$2,828 USD
View
B
Retailer 9
-
£2,372 GBP
$3,178 USD
View
B
Retailer 10
-
£2,514 GBP
$3,369 USD
View
Most Expensive
MOH London
LG425067609 · Oct 21
£3,851 GBP
View
Price last confirmed 9 days ago
10 more retailers have this diamond
Prices start from £1,156 GBPSave up to £1,358 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+
1.80ct Heart
£1,156 GBP