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Radiant|Lab Grown|IGI

3.09ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG710539520

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG710539520

Diamond specifications and retailer prices

From €318 EUR
$355 USD
As of October 30, 2026
Save €3,433 EUR (92%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €3,750 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.09ct lab-grown radiant diamond

This 3.09ct lab-grown radiant 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 LG710539520 or 710539520. Listed at 19 retailers as of October 30, 2026, with prices from €318 to €3,750, a €3,433 spread on the same certified stone. Brilliant Earth lists it at €3,750. 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

3.09
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.1°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG710539520
Dimensions10.16 × 7.19 × 4.99 mm
L/W Ratio1.41
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.16 mm7.19 mm3.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG710539520
Side View
Table 67.0%Crown 43.1°Girdle: MED-STKPavilion 36.2°Culet: NoneDepth 69.4%

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 30
Current: €3,750 EUR|Low: €304 EUR|High: €4,332 EUR|Avg: €1,068 EUR|-13.4%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 16€318 EUR
Retailer 10€354 EUR
Retailer 5€368 EUR
Retailer 6€394 EUR
Retailer 17€394 EUR
Retailer 4€528 EUR
Retailer 12€537 EUR
Retailer 15€595 EUR
Retailer 7€678 EUR
Retailer 14€691 EUR
Retailer 13€702 EUR
Retailer 3€1,154 EUR
Retailer 18€1,265 EUR
Retailer 11€1,302 EUR
Retailer 9€1,393 EUR
Retailer 8€1,510 EUR
Retailer 2€1,538 EUR
Retailer 19€2,233 EUR
Brilliant Earth€3,750 EUR

33 data points across 19 retailers

19 retailers€318 EUR to €3,750 EUR

A
Cheapest Retailer
-
€318 EUR
$355 USD
A
Retailer 2
-
€354 EUR
$396 USD
View
Final sale: no returns
A
Retailer 3
-
€368 EUR
$411 USD
View
A
Retailer 4
-
€394 EUR
$440 USD
View
Retailer 5
-
€394 EUR
$440 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
€528 EUR
$590 USD
View
A
Retailer 7
-
€537 EUR
£472 GBP
View
A
Retailer 8
-
€595 EUR
$665 USD
View
A
Retailer 9
-
€678 EUR
$757 USD
View
A
Retailer 10
-
€691 EUR
View
A
Retailer 11
-
€702 EUR
£618 GBP
View
B+
Retailer 12
-
€1,154 EUR
$1,289 USD
View
B+
Retailer 13
-
€1,265 EUR
$1,413 USD
View
B+
Retailer 14
-
€1,302 EUR
$1,454 USD
View
B
Retailer 15
-
€1,393 EUR
$1,556 USD
View
B+
Retailer 16
-
€1,510 EUR
$1,687 USD
View
B+
Retailer 17
-
€1,538 EUR
£1,353 GBP
View
B
Retailer 18
-
€2,233 EUR
$2,495 USD
View
Most Expensive
B
Brilliant Earth
16226177A · Oct 31
€3,750 EUR
$4,190 USD
View
18 more retailers have this diamond
Prices start from €318 EURSave up to €3,433 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
3.09ct Radiant
€318 EUR