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Round|Lab Grown|IGI

1.50ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG487197991

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487197991

Diamond specifications and retailer prices

From £1,040 GBP
As of November 5, 2026
Save £632 GBP (38%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,601 GBP at Friendly Diamonds · As of November 6, 2026
View at Friendly Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG487197991 or 487197991. Listed at 13 retailers as of November 5, 2026, with a 61% 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

1.50
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487197991
Dimensions7.29 × 7.27 × 4.55 mm
L/W Ratio1.00
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
7.29 mm7.27 mm1.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487197991
Side View
Table 57.5%Crown 35.9°Girdle: ThickPavilion 40.7°Culet: NoneDepth 62.5%

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 5
Current: £2,601 GBP|Low: £1,040 GBP|High: £4,476 GBP|Avg: £2,265 GBP
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6£1,040 GBP
Retailer 5£1,334 GBP
Retailer 9£1,493 GBP
Retailer 7£1,547 GBP
Retailer 2£2,150 GBP
Retailer 8£2,427 GBP
Friendly Diamonds£2,601 GBP
Retailer 3£2,926 GBP
Retailer 4£4,405 GBP

45 data points across 9 retailers

13 retailers£1,040 GBP to £1,672 GBP

B
Cheapest Retailer
-
£1,040 GBP
B
Retailer 2
-
£1,334 GBP
View
B
Retailer 3
-
£1,450 GBP
View
B
Retailer 4
-
£1,493 GBP
View
Final sale: no returns
B
Retailer 5
-
£1,547 GBP
View
Retailer 6
-
£1,547 GBP
View
Price last confirmed 25 days ago
B
Retailer 7
-
£1,672 GBP
View
Retailer 8
-
£2,150 GBP
View
Price under review
Retailer 9
-
£2,427 GBP
View
Price under review
Most Expensive
Friendly Diamonds
1588282 · Nov 6
£2,601 GBP
$3,501 USD
View
Price under review
9 more retailers have this diamond
Prices start from £1,040 GBPSave up to £632 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
£1,040 GBP