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Round|Lab Grown|IGI

3.09ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG731581171

Shape and cutting style on the report: Round brilliant

Certificate IGI LG731581171

Diamond specifications and retailer prices

From $926 USD
As of October 29, 2026
Save $9,194 USD (91%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $10,120 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG731581171 or 731581171. Listed at 27 retailers as of October 29, 2026, with prices from $926 to $10,120, a $9,194 spread on the same certified stone. Brilliant Earth lists it at $10,120. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.09
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731581171
Dimensions9.40 × 9.44 × 5.72 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
9.40 mm9.44 mm3.09 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731581171
Side View
Table 57.0%Crown 33.7°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: $10,120 USD|Low: $926 USD|High: $14,660 USD|Avg: $2,789 USD|-31.0%
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
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 3$926 USD
Retailer 17$1,007 USD
Retailer 16$1,036 USD
Retailer 6$1,074 USD
Retailer 12$1,250 USD
Retailer 5$1,284 USD
Retailer 8$1,610 USD
Retailer 2$1,649 USD
Retailer 11$1,709 USD
Retailer 13$2,215 USD
Retailer 7$2,389 USD
Retailer 10$2,425 USD
Retailer 14$2,494 USD
Retailer 4$3,019 USD
Retailer 15$3,661 USD
Retailer 9$5,155 USD
Brilliant Earth$10,120 USD

31 data points across 17 retailers

27 retailers$926 USD to $10,120 USD

A
Cheapest Retailer
-
$926 USD
A
Retailer 2
-
$1,007 USD
View
A
Retailer 3
-
$1,036 USD
View
Final sale: no returns
A
Retailer 4
-
$1,074 USD
View
A
Retailer 5
-
$1,250 USD
View
Retailer 6
-
$1,284 USD
£1,011 GBP
View
Price last confirmed 15 days ago
A
Retailer 7
-
$1,306 USD
HK$10,200 HKD
View
A
Retailer 8
-
$1,347 USD
View
A
Retailer 9
-
$1,610 USD
View
A
Retailer 10
-
$1,649 USD
£1,298 GBP
View
A
Retailer 11
-
$1,709 USD
€1,628 EUR
View
A
Retailer 12
-
$2,215 USD
A$3,408 AUD
View
A
Retailer 13
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$2,389 USD
View
A
Retailer 14
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$2,412 USD
View
A
Retailer 15
-
$2,425 USD
A$3,731 AUD
View
A
Retailer 16
-
$2,494 USD
ZAR 40,284 ZAR
View
Retailer 17
-
$2,746 USD
View
Price last confirmed 15 days ago
B+
Retailer 18
-
$3,019 USD
View
B+
Retailer 19
-
$3,360 USD
View
B+
Retailer 20
-
$3,510 USD
View
B+
Retailer 21
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$3,661 USD
£2,883 GBP
View
B+
Retailer 22
-
$3,734 USD
View
B+
Retailer 23
-
$3,775 USD
SGD 5,101 SGD
View
B+
Retailer 24
-
$4,056 USD
View
Retailer 25
-
$5,155 USD
A$7,931 AUD
View
Price last confirmed 27 days ago
B
Retailer 26
-
$9,698 USD
View
Most Expensive
B
Brilliant Earth
15998919A · Oct 31
$10,120 USD
View
26 more retailers have this diamond
Prices start from $926 USDSave up to $9,194 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
3.09ct Round
$926 USD