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Round|Lab Grown|IGI

1.50ct H SI1 Round Lab Grown Diamond

VG • H/SI1 • IGI LG436045180

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436045180

Diamond specifications and retailer prices

From £843 GBP
$1,130 USD
As of October 31, 2026
Save £3,108 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,952 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.5ct lab-grown round diamond

This 1.5ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG436045180 or 436045180. Listed at 11 retailers as of October 29, 2026, with prices from £843 to £3,952, a £3,108 spread on the same certified stone. MOH London lists it at £3,952. 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

1.50
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045180
Dimensions7.27 × 7.21 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.27 mm7.21 mm1.50 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045180
Side View
Table 55.0%Crown 35.1°Girdle: STK-THKPavilion 40.3°Culet: NoneDepth 62.8%

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 31
Current: £3,952 GBP|Low: £843 GBP|High: £3,984 GBP|Avg: £1,823 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2£843 GBP
Retailer 4£1,187 GBP
Retailer 7£1,329 GBP
Retailer 5£1,376 GBP
Retailer 10£1,436 GBP
Retailer 8£1,504 GBP
Retailer 9£1,849 GBP
Retailer 6£2,166 GBP
Retailer 3£2,434 GBP
MOH London£3,952 GBP

15 data points across 10 retailers

11 retailers£843 GBP to £3,952 GBP

A
Cheapest Retailer
-
£843 GBP
$1,130 USD
B+
Retailer 2
-
£1,187 GBP
$1,590 USD
View
B
Retailer 3
-
£1,291 GBP
$1,730 USD
View
B
Retailer 4
-
£1,329 GBP
$1,781 USD
View
Final sale: no returns
B
Retailer 5
-
£1,376 GBP
$1,844 USD
View
Retailer 6
-
£1,376 GBP
$1,844 USD
View
Price last confirmed 19 days ago
B
Retailer 7
-
£1,504 GBP
$2,015 USD
View
B
Retailer 8
-
£2,166 GBP
$2,902 USD
View
B
Retailer 9
-
£2,434 GBP
$3,261 USD
View
B
Retailer 10
-
£2,580 GBP
$3,457 USD
View
Most Expensive
B
MOH London
LG436045180 · Oct 29
£3,952 GBP
View
10 more retailers have this diamond
Prices start from £843 GBPSave up to £3,108 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
1.50ct Round
£843 GBP