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Round|Lab Grown|IGI

4.08ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG728518789

Shape and cutting style on the report: Round brilliant

Certificate IGI LG728518789

Diamond specifications and retailer prices

From €577 EUR
$645 USD
As of October 31, 2026
Save €3,254 EUR (85%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €3,831 EUR at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.08ct lab-grown round diamond

This 4.08ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG728518789 or 728518789. Listed at 17 retailers as of October 29, 2026, with prices from €577 to €3,831, a €3,254 spread on the same certified stone. Brilliant Earth lists it at €3,831. 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

4.08
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728518789
Dimensions10.23 × 10.21 × 6.33 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
10.23 mm10.21 mm4.08 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728518789
Side View
Table 58.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

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 31
Current: €3,831 EUR|Low: €577 EUR|High: €3,929 EUR|Avg: €1,417 EUR|-2.5%
Brilliant Earth
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
October 31, 2026
Retailer 6€577 EUR
Retailer 13€639 EUR
Retailer 9€714 EUR
Retailer 7€756 EUR
Retailer 12€857 EUR
Retailer 14€922 EUR
Retailer 2€960 EUR
Retailer 8€987 EUR
Retailer 5€1,522 EUR
Retailer 11€1,587 EUR
Retailer 3€2,043 EUR
Retailer 4€2,071 EUR
Retailer 10€2,791 EUR
Brilliant Earth€3,831 EUR

41 data points across 14 retailers

17 retailers€577 EUR to €3,831 EUR

A
Cheapest Retailer
-
€577 EUR
$645 USD
Final sale: no returns
Retailer 2
-
€639 EUR
$714 USD
View
Price last confirmed 15 days ago
Retailer 3
-
€658 EUR
$735 USD
View
Price last confirmed 32 days ago
A
Retailer 4
-
€714 EUR
£628 GBP
View
A
Retailer 5
-
€756 EUR
$845 USD
View
B+
Retailer 6
-
€857 EUR
$958 USD
View
A
Retailer 7
-
€922 EUR
$1,030 USD
View
A
Retailer 8
-
€960 EUR
View
A
Retailer 9
-
€987 EUR
£869 GBP
View
B+
Retailer 10
-
€1,522 EUR
$1,700 USD
View
B+
Retailer 11
-
€1,587 EUR
$1,773 USD
View
Retailer 12
-
€1,753 EUR
$1,959 USD
View
Price last confirmed 32 days ago
B
Retailer 13
-
€2,043 EUR
$2,282 USD
View
B
Retailer 14
-
€2,071 EUR
$2,314 USD
View
Retailer 15
-
€2,401 EUR
$2,683 USD
View
Price last confirmed 39 days ago
B
Retailer 16
-
€2,791 EUR
£2,455 GBP
View
Most Expensive
B
Brilliant Earth
18586919A · Oct 29
€3,831 EUR
$4,280 USD
View
16 more retailers have this diamond
Prices start from €577 EURSave up to €3,254 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
4.08ct Round
€577 EUR