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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 $505 AUD
$355 USD
As of October 30, 2026
Save $5,460 AUD (92%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $5,965 AUD at Brilliant Earth · As of October 30, 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 $505 to $5,965, a $5,460 spread on the same certified stone. Brilliant Earth lists it at $5,965. 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
Colour
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: $5,965 AUD|Low: $471 AUD|High: $6,890 AUD|Avg: $1,699 AUD|-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
October 31, 2026
Retailer 13$505 AUD
Retailer 10$564 AUD
Retailer 5$585 AUD
Retailer 6$626 AUD
Retailer 15$626 AUD
Retailer 4$840 AUD
Retailer 14$856 AUD
Retailer 12$947 AUD
Retailer 7$1,078 AUD
Retailer 18$1,096 AUD
Retailer 2$1,126 AUD
Retailer 3$1,835 AUD
Retailer 17$2,012 AUD
Retailer 11$2,070 AUD
Retailer 9$2,215 AUD
Retailer 8$2,401 AUD
Retailer 16$2,459 AUD
Retailer 19$3,552 AUD
Brilliant Earth$5,965 AUD

33 data points across 19 retailers

19 retailers$505 AUD to $5,965 AUD

A
Cheapest Retailer
-
$505 AUD
$355 USD
A
Retailer 2
-
$564 AUD
$396 USD
View
Final sale: no returns
A
Retailer 3
-
$585 AUD
$411 USD
View
A
Retailer 4
-
$626 AUD
$440 USD
View
A
Retailer 5
-
$626 AUD
$440 USD
View
B+
Retailer 6
-
$840 AUD
$590 USD
View
A
Retailer 7
-
$856 AUD
£473 GBP
View
A
Retailer 8
-
$947 AUD
$665 USD
View
A
Retailer 9
-
$1,078 AUD
$757 USD
View
Retailer 10
-
$1,096 AUD
€733 EUR
View
Price last confirmed 8 days ago
A
Retailer 11
-
$1,126 AUD
£623 GBP
View
B+
Retailer 12
-
$1,835 AUD
$1,289 USD
View
B+
Retailer 13
-
$2,012 AUD
$1,413 USD
View
B+
Retailer 14
-
$2,070 AUD
$1,454 USD
View
B
Retailer 15
-
$2,215 AUD
$1,556 USD
View
B+
Retailer 16
-
$2,401 AUD
$1,687 USD
View
B+
Retailer 17
-
$2,459 AUD
£1,360 GBP
View
B
Retailer 18
-
$3,552 AUD
$2,495 USD
View
Most Expensive
B
Brilliant Earth
16226177A · Oct 30
$5,965 AUD
$4,190 USD
View
18 more retailers have this diamond
Prices start from $505 AUDSave up to $5,460 AUD

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
$505 AUD