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 $548 USD
As of November 1, 2026
Save $1,238 USD (69%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,850 USD 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 31, 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: Nov 1
Current: $2,850 USD|Low: $526 USD|High: $2,869 USD|Avg: $1,196 USD|-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$548 USD
Retailer 13$613 USD
Retailer 9$679 USD
Retailer 12$679 USD
Retailer 7$815 USD
Retailer 2$896 USD
Retailer 3$1,048 USD
Retailer 6$1,055 USD
Retailer 4$1,072 USD
Retailer 5$1,475 USD
Retailer 8$1,752 USD
Retailer 11$1,786 USD
MOH London$2,850 USD

39 data points across 13 retailers

13 retailers$548 USD to $1,786 USD

A
Cheapest Retailer
-
$548 USD
A
Retailer 2
-
$613 USD
View
A
Retailer 3
-
$679 USD
View
Retailer 4
-
$679 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
$815 USD
View
A
Retailer 6
-
$896 USD
£705 GBP
View
B+
Retailer 7
-
$1,048 USD
View
A
Retailer 8
-
$1,055 USD
£831 GBP
View
A
Retailer 9
-
$1,072 USD
View
B+
Retailer 10
-
$1,475 USD
View
B
Retailer 11
-
$1,752 USD
View
B+
Retailer 12
-
$1,786 USD
View
Most Expensive
MOH London
LG817688842 · Oct 19
$2,850 USD
£2,244 GBP
View
Price last confirmed 13 days ago
12 more retailers have this diamond
Prices start from $548 USDSave up to $1,238 USD

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
$548 USD