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Round|Lab Grown|IGI

3.78ct G VS2 Round Lab Grown Diamond

ID • G/VS2 • IGI LG620402846

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620402846

Diamond specifications and retailer prices

From £321 GBP
$430 USD
As of October 29, 2026
Save £1,101 GBP (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,422 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 LG620402846 or 620402846. Listed at 5 retailers as of October 29, 2026, with prices from £321 to £1,422, a £1,101 spread on the same certified stone. The Diamond Guys lists it at £1,422. 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°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620402846
Dimensions10.18 × 10.11 × 6.09 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
10.18 mm10.11 mm3.78 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620402846
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.0%

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: £321 GBP|Low: £239 GBP|High: £2,563 GBP|Avg: £1,007 GBP|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
The Diamond Guys
October 27, 2026
Retailer 1£321 GBP
Retailer 13£366 GBP
Retailer 8£372 GBP
Retailer 11£532 GBP
Retailer 12£569 GBP
Retailer 10£580 GBP
Retailer 9£598 GBP
Retailer 3£627 GBP
Retailer 15£951 GBP
Retailer 14£975 GBP
Retailer 6£1,075 GBP
Retailer 2£1,212 GBP
The Diamond Guys£1,422 GBP
Retailer 4£1,517 GBP
Retailer 7£2,239 GBP
Retailer 5£2,563 GBP

11 data points across 16 retailers

5 retailers£321 GBP to £1,422 GBP

A
Cheapest Retailer
-
£321 GBP
$430 USD
Final sale: no returns
Retailer 2
-
£366 GBP
$491 USD
View
Price last confirmed 44 days ago
Retailer 3
-
£532 GBP
View
Price last confirmed 43 days ago
B+
Retailer 4
-
£1,075 GBP
CA$2,001 CAD
View
Most Expensive
B+
The Diamond Guys
1954434155 · Oct 30
£1,422 GBP
$1,905 USD
View
4 more retailers have this diamond
Prices start from £321 GBPSave up to £1,101 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
£321 GBP