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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 $260 USD
As of October 30, 2026
Save $2,390 USD (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $2,650 USD at Brilliant Earth · As of October 30, 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 October 30, 2026, with prices from $260 to $2,650, a $2,390 spread on the same certified stone. Brilliant Earth lists it at $2,650. 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
Color
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: Oct 30
Current: $2,650 USD|Low: $290 USD|High: $2,840 USD|Avg: $903 USD|-6.7%
Brilliant Earth
Retailer 2
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Retailer 7
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Retailer 21
October 30, 2026
Retailer 8$290 USD
Retailer 18$301 USD
Retailer 4$322 USD
Retailer 5$358 USD
Retailer 17$480 USD
Retailer 21$530 USD
Retailer 9$537 USD
Retailer 16$553 USD
Retailer 7$577 USD
Retailer 2$616 USD
Retailer 15$784 USD
Retailer 3$887 USD
Retailer 19$990 USD
Retailer 6$1,035 USD
Retailer 12$1,040 USD
Retailer 14$1,087 USD
Retailer 10$1,250 USD
Retailer 13$1,298 USD
Retailer 11$1,384 USD
Retailer 20$1,845 USD
Brilliant Earth$2,650 USD

39 data points across 21 retailers

23 retailers$260 USD to $2,650 USD

A
Cheapest Retailer
-
$260 USD
A
Retailer 2
-
$290 USD
View
Final sale: no returns
A
Retailer 3
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$301 USD
View
A
Retailer 4
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$322 USD
View
A
Retailer 5
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$322 USD
View
A
Retailer 6
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$358 USD
HK$2,800 HKD
View
A
Retailer 7
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$480 USD
View
Retailer 8
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$530 USD
€505 EUR
View
Price last confirmed 7 days ago
A
Retailer 9
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$537 USD
View
A
Retailer 10
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$553 USD
ZAR 8,940 ZAR
View
A
Retailer 11
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$577 USD
View
A
Retailer 12
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$616 USD
£485 GBP
View
A
Retailer 13
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$784 USD
A$1,206 AUD
View
B+
Retailer 14
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$887 USD
View
B+
Retailer 15
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$990 USD
View
B+
Retailer 16
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$1,035 USD
View
B+
Retailer 17
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$1,040 USD
SGD 1,406 SGD
View
B+
Retailer 18
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$1,087 USD
View
B+
Retailer 19
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$1,250 USD
£984 GBP
View
B+
Retailer 20
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$1,298 USD
£1,022 GBP
View
B
Retailer 21
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$1,384 USD
View
Retailer 22
-
$1,845 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
19067170A · Oct 30
$2,650 USD
View
22 more retailers have this diamond
Prices start from $260 USDSave up to $2,390 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
1.31ct Radiant
$260 USD