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Round|Lab Grown|IGI

5.09ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG687506485

Shape and cutting style on the report: Round brilliant

Certificate IGI LG687506485

Diamond specifications and retailer prices

From $722 USD
As of October 29, 2026
Save $2,721 USD (79%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $6,510 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 5.09ct lab-grown round diamond

This 5.09ct lab-grown round sits in the over five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG687506485 or 687506485. Listed at 17 retailers as of October 25, 2026, with a 377% 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

5.09
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG687506485
Dimensions11.16 × 11.11 × 6.67 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
11.16 mm11.11 mm5.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG687506485
Side View
Table 59.0%Crown 33.4°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.0%

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 29
Current: $6,510 USD|Low: $722 USD|High: $8,460 USD|Avg: $2,218 USD|-23.0%
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 30, 2026
Retailer 11$722 USD
Retailer 8$724 USD
Retailer 13$837 USD
Retailer 12$1,015 USD
Retailer 7$1,195 USD
Retailer 2$1,295 USD
Retailer 9$1,338 USD
Retailer 14$1,370 USD
Retailer 3$1,838 USD
Retailer 5$1,866 USD
Retailer 10$2,691 USD
Retailer 4$3,443 USD
Retailer 6$4,760 USD
Brilliant Earth$6,510 USD

34 data points across 14 retailers

17 retailers$722 USD to $3,443 USD

A
Cheapest Retailer
-
$722 USD
A
Retailer 2
-
$724 USD
£570 GBP
View
A
Retailer 3
-
$821 USD
View
A
Retailer 4
-
$837 USD
View
Retailer 5
-
$876 USD
View
Price last confirmed 18 days ago
A
Retailer 6
-
$1,015 USD
View
B+
Retailer 7
-
$1,195 USD
View
B+
Retailer 8
-
$1,295 USD
View
B+
Retailer 9
-
$1,338 USD
£1,054 GBP
View
B+
Retailer 10
-
$1,370 USD
€1,305 EUR
View
B+
Retailer 11
-
$1,838 USD
A$2,828 AUD
View
B+
Retailer 12
-
$1,866 USD
View
B
Retailer 13
-
$2,462 USD
View
B
Retailer 14
-
$2,691 USD
View
B
Retailer 15
-
$3,443 USD
£2,711 GBP
View
Retailer 16
-
$4,760 USD
View
Price last confirmed 12 days ago
Most Expensive
Brilliant Earth
13761774A · Oct 30
$6,510 USD
View
Price under review
16 more retailers have this diamond
Prices start from $722 USDSave up to $2,721 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
5.09ct Round
$722 USD