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Round|Lab Grown|IGI

3.90ct H VS1 Round Lab Grown Diamond

ID • H/VS1 • IGI LG618491971

Shape and cutting style on the report: Round brilliant

Certificate IGI LG618491971

Diamond specifications and retailer prices

From £478 GBP
HK$5,000 HKD
As of October 30, 2026
Save £1,146 GBP (71%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,773 GBP at Rare Carat · As of September 16, 2026
View at Rare Carat

About this 3.9ct lab-grown round diamond

This 3.9ct lab-grown round sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG618491971 or 618491971. Listed at 9 retailers as of October 29, 2026, with a 240% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.90
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618491971
Dimensions10.19 × 10.12 × 6.16 mm
L/W Ratio1.01
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
10.19 mm10.12 mm3.90 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618491971
Side View
Table 58.0%Crown 34.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.8%

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 30
Current: £1,773 GBP|Low: £478 GBP|High: £1,902 GBP|Avg: £1,105 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 11£478 GBP
Retailer 3£556 GBP
Retailer 5£667 GBP
Retailer 2£686 GBP
Retailer 7£686 GBP
Retailer 9£944 GBP
Retailer 6£1,393 GBP
Retailer 10£1,435 GBP
Retailer 4£1,624 GBP
Rare Carat£1,773 GBP
Retailer 8£1,902 GBP

24 data points across 11 retailers

9 retailers£478 GBP to £1,624 GBP

A
Cheapest Retailer
-
£478 GBP
HK$5,000 HKD
A
Retailer 2
-
£667 GBP
€851 EUR
View
B+
Retailer 3
-
£686 GBP
$919 USD
View
A
Retailer 4
-
£686 GBP
$919 USD
View
B+
Retailer 5
-
£944 GBP
$1,265 USD
View
B+
Retailer 6
-
£1,393 GBP
SGD 2,523 SGD
View
B+
Retailer 7
-
£1,435 GBP
$1,923 USD
View
B+
Retailer 8
-
£1,624 GBP
View
Most Expensive
Rare Carat
MA-10146_l_618491971 · Sep 16
£1,773 GBP
$2,376 USD
View
Price last confirmed 44 days ago
8 more retailers have this diamond
Prices start from £478 GBPSave up to £1,146 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
3.90ct Round
£478 GBP