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Round|Lab Grown|IGI

3.78ct G VS2 Round Lab Grown Diamond

ID • G/VS2 • IGI LG629407428

Shape and cutting style on the report: Round brilliant

Certificate IGI LG629407428

Diamond specifications and retailer prices

From £323 GBP
$430 USD
As of October 29, 2026
Save £1,108 GBP (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,431 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.78ct lab-grown round diamond

This 3.78ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG629407428 or 629407428. Listed at 5 retailers as of October 29, 2026, with prices from £323 to £1,431, a £1,108 spread on the same certified stone. The Diamond Guys lists it at £1,431. 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

3.78
Carat
G
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629407428
Dimensions10.07 × 10.04 × 6.08 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
10.07 mm10.04 mm3.78 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629407428
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.5%

Caratlytics Score

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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: Oct 29
Current: £323 GBP|Low: £240 GBP|High: £4,603 GBP|Avg: £1,272 GBP|-1.6%
Retailer 1
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Retailer 12
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Retailer 17
The Diamond Guys
October 27, 2026
Retailer 1£323 GBP
Retailer 15£369 GBP
Retailer 10£374 GBP
Retailer 13£535 GBP
Retailer 14£573 GBP
Retailer 12£584 GBP
Retailer 11£601 GBP
Retailer 17£627 GBP
Retailer 2£957 GBP
Retailer 16£981 GBP
Retailer 7£1,082 GBP
Retailer 3£1,219 GBP
The Diamond Guys£1,431 GBP
Retailer 4£1,527 GBP
Retailer 6£2,013 GBP
Retailer 9£2,253 GBP
Retailer 5£2,579 GBP
Retailer 8£4,603 GBP

11 data points across 18 retailers

5 retailers£323 GBP to £1,431 GBP

A
Cheapest Retailer
-
£323 GBP
$430 USD
Final sale: no returns
Retailer 2
-
£369 GBP
$491 USD
View
Price last confirmed 44 days ago
Retailer 3
-
£535 GBP
View
Price last confirmed 43 days ago
B+
Retailer 4
-
£1,082 GBP
CA$2,001 CAD
View
Most Expensive
B+
The Diamond Guys
1954434157 · Oct 30
£1,431 GBP
$1,905 USD
View
4 more retailers have this diamond
Prices start from £323 GBPSave up to £1,108 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
3.78ct Round
£323 GBP