Round|Lab Grown|IGI

4.05ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG817688842

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817688842

Diamond specifications and retailer prices

From €491 EUR
$548 USD
As of October 29, 2026
Save €1,108 EUR (69%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €2,551 EUR at MOH London · As of October 19, 2026
View at MOH London

About this 4.05ct lab-grown round diamond

This 4.05ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817688842 or 817688842. Listed at 13 retailers as of October 29, 2026, with a 226% 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

4.05
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817688842
Dimensions10.33 × 10.29 × 6.25 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.33 mm10.29 mm4.05 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817688842
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 60.7%

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 29
Current: €2,551 EUR|Low: €471 EUR|High: €2,568 EUR|Avg: €1,070 EUR|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 10€491 EUR
Retailer 13€549 EUR
Retailer 9€608 EUR
Retailer 12€608 EUR
Retailer 6€729 EUR
Retailer 7€804 EUR
Retailer 3€938 EUR
Retailer 2€944 EUR
Retailer 4€960 EUR
Retailer 5€1,320 EUR
Retailer 8€1,568 EUR
Retailer 11€1,599 EUR
MOH London€2,551 EUR

39 data points across 13 retailers

13 retailers€491 EUR to €1,599 EUR

A
Cheapest Retailer
-
€491 EUR
$548 USD
A
Retailer 2
-
€549 EUR
$613 USD
View
A
Retailer 3
-
€608 EUR
$679 USD
View
Retailer 4
-
€608 EUR
$679 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
€729 EUR
$815 USD
View
A
Retailer 6
-
€804 EUR
£707 GBP
View
B+
Retailer 7
-
€938 EUR
$1,048 USD
View
A
Retailer 8
-
€944 EUR
£831 GBP
View
A
Retailer 9
-
€960 EUR
$1,072 USD
View
B+
Retailer 10
-
€1,320 EUR
$1,475 USD
View
B
Retailer 11
-
€1,568 EUR
$1,752 USD
View
B+
Retailer 12
-
€1,599 EUR
$1,786 USD
View
Most Expensive
MOH London
LG817688842 · Oct 19
€2,551 EUR
£2,244 GBP
View
Price last confirmed 12 days ago
12 more retailers have this diamond
Prices start from €491 EURSave up to €1,108 EUR

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
4.05ct Round
€491 EUR