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Round|Lab Grown|IGI

1.50ct H SI1 Round Lab Grown Diamond

GD • H/SI1 • IGI LG425067155

Shape and cutting style on the report: Round brilliant

Certificate IGI LG425067155

Diamond specifications and retailer prices

From £970 GBP
$1,300 USD
As of October 31, 2026
Save £2,981 GBP (75%) 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 standard cut grade and certified by IGI LG425067155 or 425067155. Listed at 11 retailers as of October 29, 2026, with prices from £970 to £3,952, a £2,981 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
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceNone
Crown angle33.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425067155
Dimensions7.36 × 7.30 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) process Type IIa
Top View
7.36 mm7.30 mm1.50 ctH / SI1
OriginLab Grown
CutGood
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI LG425067155
Side View
Table 53.0%Crown 33.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.7%

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 31
Current: £3,952 GBP|Low: £970 GBP|High: £3,984 GBP|Avg: £1,810 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 4£970 GBP
Retailer 3£1,187 GBP
Retailer 7£1,328 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 2£2,434 GBP
MOH London£3,952 GBP

14 data points across 10 retailers

11 retailers£970 GBP to £3,952 GBP

B+
Cheapest Retailer
-
£970 GBP
$1,300 USD
B
Retailer 2
-
£1,187 GBP
$1,590 USD
View
B
Retailer 3
-
£1,291 GBP
$1,730 USD
View
B
Retailer 4
-
£1,328 GBP
$1,779 USD
View
Final sale: no returns
Retailer 5
-
£1,376 GBP
$1,844 USD
View
Price last confirmed 19 days ago
B
Retailer 6
-
£1,376 GBP
$1,844 USD
View
B
Retailer 7
-
£1,504 GBP
$2,015 USD
View
C
Retailer 8
-
£2,166 GBP
$2,902 USD
View
C
Retailer 9
-
£2,434 GBP
$3,261 USD
View
C
Retailer 10
-
£2,580 GBP
$3,457 USD
View
Most Expensive
C
MOH London
LG425067155 · Oct 29
£3,952 GBP
View
10 more retailers have this diamond
Prices start from £970 GBPSave up to £2,981 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+
1.50ct Round
£970 GBP