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Round|Lab Grown|IGI

3.88ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG645498338

Shape and cutting style on the report: Round brilliant

Certificate IGI LG645498338

Diamond specifications and retailer prices

From £310 GBP
$416 USD
As of October 29, 2026
Save £1,079 GBP (78%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,390 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.88ct lab-grown round diamond

This 3.88ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG645498338 or 645498338. Listed at 3 retailers as of October 29, 2026, with prices from £310 to £1,390, a £1,079 spread on the same certified stone. The Diamond Guys lists it at £1,390. 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

3.88
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645498338
Dimensions10.08 × 10.03 × 6.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.08 mm10.03 mm3.88 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645498338
Side View
Table 55.0%Crown 34.7°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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: Oct 29
Current: £310 GBP|Low: £237 GBP|High: £4,030 GBP|Avg: £1,119 GBP|-4.4%
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
Retailer 14
The Diamond Guys
October 27, 2026
Retailer 1£310 GBP
Retailer 7£367 GBP
Retailer 10£489 GBP
Retailer 11£565 GBP
Retailer 9£573 GBP
Retailer 8£598 GBP
Retailer 13£619 GBP
Retailer 2£872 GBP
Retailer 14£943 GBP
Retailer 12£962 GBP
Retailer 5£1,051 GBP
The Diamond Guys£1,390 GBP
Retailer 3£1,775 GBP
Retailer 6£2,157 GBP
Retailer 4£4,030 GBP

10 data points across 15 retailers

3 retailers£310 GBP to £1,390 GBP

A
Cheapest Retailer
-
£310 GBP
$416 USD
Final sale: no returns
B+
Retailer 2
-
£1,051 GBP
CA$1,956 CAD
View
Most Expensive
B
The Diamond Guys
1954434257 · Oct 30
£1,390 GBP
$1,862 USD
View
2 more retailers have this diamond
Prices start from £310 GBPSave up to £1,079 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
3.88ct Round
£310 GBP