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Radiant|Lab Grown|IGI

3.11ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG727578351

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

Certificate IGI LG727578351

Diamond specifications and retailer prices

From $1,780 AUD
$1,250 USD
As of October 30, 2026
Save $15,275 AUD (90%) vs most expensive(unlock to see where)
31 retailers carry this diamond
Most expensive: $17,055 AUD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.11ct lab-grown radiant diamond

This 3.11ct lab-grown radiant 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 LG727578351 or 727578351. Listed at 31 retailers as of October 28, 2026, with prices from $1,780 to $17,055, a $15,275 spread on the same certified stone. Brilliant Earth lists it at $17,055. 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

3.11
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG727578351
Dimensions7.40 × 7.40 × 4.86 mm
L/W Ratio1.00
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
7.40 mm7.40 mm3.11 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG727578351
Side View
Table 63.0%Crown 41°Girdle: MediumPavilion 34°Culet: NoneDepth 65.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $17,055 AUD|Low: $1,780 AUD|High: $17,055 AUD|Avg: $5,530 AUD
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
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Retailer 7
Retailer 8
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Retailer 21
Retailer 22
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Retailer 24
November 1, 2026
Retailer 5$1,780 AUD
Retailer 21$1,993 AUD
Retailer 22$2,313 AUD
Retailer 3$2,402 AUD
Retailer 7$2,515 AUD
Retailer 13$2,909 AUD
Retailer 2$3,103 AUD
Retailer 20$3,302 AUD
Retailer 24$3,848 AUD
Retailer 18$3,871 AUD
Retailer 23$4,355 AUD
Retailer 19$4,663 AUD
Retailer 12$4,794 AUD
Retailer 11$4,990 AUD
Retailer 17$5,844 AUD
Retailer 4$5,925 AUD
Retailer 6$6,471 AUD
Retailer 10$7,243 AUD
Retailer 9$7,262 AUD
Retailer 14$7,301 AUD
Retailer 8$7,882 AUD
Retailer 16$8,214 AUD
Retailer 15$9,894 AUD
Brilliant Earth$17,055 AUD

31 data points across 24 retailers

31 retailers$1,780 AUD to $17,055 AUD

A
Cheapest Retailer
-
$1,780 AUD
$1,250 USD
Retailer 2
-
$1,949 AUD
$1,369 USD
View
Price last confirmed 24 days ago
A
Retailer 3
-
$1,993 AUD
$1,400 USD
View
Final sale: no returns
Retailer 4
-
$2,094 AUD
$1,471 USD
View
Price last confirmed 32 days ago
Retailer 5
-
$2,261 AUD
$1,588 USD
View
Price last confirmed 29 days ago
Retailer 6
-
$2,279 AUD
$1,601 USD
View
Price last confirmed 35 days ago
A
Retailer 7
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$2,313 AUD
$1,625 USD
View
Retailer 8
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$2,396 AUD
$1,683 USD
View
Price last confirmed 35 days ago
A
Retailer 9
-
$2,402 AUD
$1,687 USD
View
A
Retailer 10
-
$2,515 AUD
HK$13,800 HKD
View
A
Retailer 11
-
$2,909 AUD
£1,609 GBP
View
A
Retailer 12
-
$3,103 AUD
$2,180 USD
View
A
Retailer 13
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$3,302 AUD
€2,209 EUR
View
A
Retailer 14
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$3,848 AUD
$2,703 USD
View
A
Retailer 15
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$3,871 AUD
$2,719 USD
View
Retailer 16
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$4,237 AUD
$2,976 USD
View
Price last confirmed 22 days ago
A
Retailer 17
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$4,355 AUD
$3,059 USD
View
Retailer 18
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$4,554 AUD
$3,199 USD
View
Price last confirmed 32 days ago
A
Retailer 19
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$4,663 AUD
View
A
Retailer 20
-
$4,794 AUD
ZAR 54,407 ZAR
View
A
Retailer 21
-
$4,990 AUD
£2,760 GBP
View
B+
Retailer 22
-
$5,844 AUD
$4,105 USD
View
B+
Retailer 23
-
$5,925 AUD
$4,162 USD
View
B+
Retailer 24
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$6,471 AUD
$4,545 USD
View
B+
Retailer 25
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$7,243 AUD
$5,088 USD
View
B+
Retailer 26
-
$7,262 AUD
SGD 6,893 SGD
View
B+
Retailer 27
-
$7,301 AUD
£4,038 GBP
View
B+
Retailer 28
-
$7,882 AUD
$5,537 USD
View
Retailer 29
-
$8,214 AUD
$5,770 USD
View
Price last confirmed 27 days ago
Retailer 30
-
$9,894 AUD
View
Price last confirmed 27 days ago
Most Expensive
B
Brilliant Earth
15743852A · Oct 28
$17,055 AUD
$11,980 USD
View
30 more retailers have this diamond
Prices start from $1,780 AUDSave up to $15,275 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
3.11ct Radiant
$1,780 AUD