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Radiant|Lab Grown|IGI

1.31ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG780636936

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

Certificate IGI LG780636936

Diamond specifications and retailer prices

From $371 AUD
As of November 4, 2026
Save $3,414 AUD (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,786 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.31ct lab-grown radiant diamond

This 1.31ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780636936 or 780636936. Listed at 23 retailers as of November 4, 2026, with prices from $371 to $3,786, a $3,414 spread on the same certified stone. Brilliant Earth lists it at $3,786. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.4°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780636936
Dimensions7.78 × 5.35 × 3.60 mm
L/W Ratio1.45
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
7.78 mm5.35 mm1.31 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780636936
Side View
Table 63.0%Crown 46.4°Girdle: Slightly ThickPavilion 34.3°Culet: NoneDepth 67.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $3,786 AUD|Low: $371 AUD|High: $4,057 AUD|Avg: $1,220 AUD|-6.7%
Brilliant Earth
Retailer 2
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Retailer 23
November 6, 2026
Retailer 6$371 AUD
Retailer 9$414 AUD
Retailer 21$430 AUD
Retailer 4$460 AUD
Retailer 10$460 AUD
Retailer 5$511 AUD
Retailer 20$686 AUD
Retailer 18$759 AUD
Retailer 11$767 AUD
Retailer 17$794 AUD
Retailer 8$824 AUD
Retailer 2$867 AUD
Retailer 13$1,129 AUD
Retailer 3$1,267 AUD
Retailer 22$1,414 AUD
Retailer 7$1,478 AUD
Retailer 15$1,486 AUD
Retailer 16$1,551 AUD
Retailer 12$1,784 AUD
Retailer 19$1,853 AUD
Retailer 14$1,977 AUD
Retailer 23$2,636 AUD
Brilliant Earth$3,786 AUD

41 data points across 23 retailers

23 retailers$371 AUD to $3,786 AUD

A
Cheapest Retailer
-
$371 AUD
A
Retailer 2
-
$414 AUD
View
Final sale: no returns
A
Retailer 3
-
$430 AUD
View
Retailer 4
-
$460 AUD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$460 AUD
View
A
Retailer 6
-
$511 AUD
View
A
Retailer 7
-
$686 AUD
View
A
Retailer 8
-
$759 AUD
View
A
Retailer 9
-
$767 AUD
View
A
Retailer 10
-
$794 AUD
View
A
Retailer 11
-
$824 AUD
View
A
Retailer 12
-
$867 AUD
View
A
Retailer 13
-
$1,129 AUD
View
B+
Retailer 14
-
$1,267 AUD
View
B+
Retailer 15
-
$1,414 AUD
View
B+
Retailer 16
-
$1,478 AUD
View
B+
Retailer 17
-
$1,486 AUD
View
B+
Retailer 18
-
$1,551 AUD
View
B+
Retailer 19
-
$1,784 AUD
View
Retailer 20
-
$1,853 AUD
View
Price last confirmed 8 days ago
B
Retailer 21
-
$1,977 AUD
View
Retailer 22
-
$2,636 AUD
View
Price last confirmed 16 days ago
Most Expensive
B
Brilliant Earth
19067170A · Nov 4
$3,786 AUD
$2,650 USD
View
22 more retailers have this diamond
Prices start from $371 AUDSave up to $3,414 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
1.31ct Radiant
$371 AUD