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Round|Lab Grown|IGI

1.50ct G IF Round Lab Grown Diamond

ID • G/IF • IGI LG587321551

Shape and cutting style on the report: Round brilliant

Certificate IGI LG587321551

Diamond specifications and retailer prices

From £450 GBP
As of November 4, 2026
Save £820 GBP (65%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,270 GBP at Rare Carat · As of November 4, 2026
View at Rare Carat

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 G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG587321551 or 587321551. Listed at 7 retailers as of November 4, 2026, with prices from £450 to £1,270, a £820 spread on the same certified stone. Rare Carat lists it at £1,270. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
G
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG587321551
Dimensions7.46 × 7.42 × 4.45 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II Faint Blue
Top View
7.46 mm7.42 mm1.50 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG587321551
Side View
Table 59.0%Crown 33°Girdle: MediumPavilion 40.9°Culet: NoneDepth 59.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £1,270 GBP|Low: £411 GBP|High: £1,426 GBP|Avg: £804 GBP|-10.9%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 8£411 GBP
Retailer 6£450 GBP
Retailer 3£482 GBP
Retailer 4£501 GBP
Retailer 5£628 GBP
Retailer 2£1,100 GBP
Retailer 7£1,266 GBP
Rare Carat£1,270 GBP

39 data points across 8 retailers

7 retailers£450 GBP to £1,270 GBP

A
Cheapest Retailer
-
£450 GBP
A
Retailer 2
-
£482 GBP
View
A
Retailer 3
-
£501 GBP
View
B+
Retailer 4
-
£628 GBP
View
B
Retailer 5
-
£1,100 GBP
View
B
Retailer 6
-
£1,266 GBP
View
Most Expensive
B
Rare Carat
OSWRD-156_l_587321551 · Nov 4
£1,270 GBP
$1,715 USD
View
6 more retailers have this diamond
Prices start from £450 GBPSave up to £820 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
£450 GBP