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Round|Lab Grown|IGI

4.09ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG706555800

Shape and cutting style on the report: Round brilliant

Certificate IGI LG706555800

Diamond specifications and retailer prices

From $547 USD
As of October 26, 2026
Save $2,913 USD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,460 USD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 4.09ct lab-grown round diamond

This 4.09ct 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 LG706555800 or 706555800. Listed at 19 retailers as of October 26, 2026, with prices from $547 to $3,460, a $2,913 spread on the same certified stone. Brilliant Earth lists it at $3,460. 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

4.09
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG706555800
Dimensions10.33 × 10.28 × 6.29 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
10.33 mm10.28 mm4.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG706555800
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.1%

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 26
Current: $3,460 USD|Low: $547 USD|High: $3,570 USD|Avg: $1,608 USD|-3.1%
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
Retailer 15
October 29, 2026
Retailer 15$547 USD
Retailer 7$612 USD
Retailer 9$910 USD
Retailer 14$910 USD
Retailer 3$998 USD
Retailer 2$1,034 USD
Retailer 10$1,047 USD
Retailer 8$1,273 USD
Retailer 4$1,697 USD
Retailer 12$1,749 USD
Retailer 5$2,193 USD
Retailer 6$2,200 USD
Retailer 13$2,730 USD
Retailer 11$2,833 USD
Brilliant Earth$3,460 USD

42 data points across 15 retailers

19 retailers$547 USD to $3,460 USD

A
Cheapest Retailer
-
$547 USD
A
Retailer 2
-
$612 USD
View
A
Retailer 3
-
$678 USD
View
Retailer 4
-
$678 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$910 USD
View
B+
Retailer 6
-
$910 USD
View
A
Retailer 7
-
$998 USD
View
A
Retailer 8
-
$1,034 USD
€985 EUR
View
A
Retailer 9
-
$1,047 USD
£824 GBP
View
B+
Retailer 10
-
$1,273 USD
A$1,958 AUD
View
B+
Retailer 11
-
$1,697 USD
View
B+
Retailer 12
-
$1,749 USD
View
B+
Retailer 13
-
$1,783 USD
View
B
Retailer 14
-
$2,193 USD
View
B
Retailer 15
-
$2,200 USD
View
Retailer 16
-
$2,730 USD
View
Price last confirmed 9 days ago
Retailer 17
-
$2,745 USD
View
Price last confirmed 36 days ago
B
Retailer 18
-
$2,833 USD
£2,231 GBP
View
Most Expensive
B
Brilliant Earth
14469124A · Oct 26
$3,460 USD
View
18 more retailers have this diamond
Prices start from $547 USDSave up to $2,913 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
4.09ct Round
$547 USD