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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 $364 CAD
$260 USD
As of October 30, 2026
Save $3,555 CAD (91%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,919 CAD at Brilliant Earth · As of October 29, 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 29, 2026, with prices from $364 to $3,919, a $3,555 spread on the same certified stone. Brilliant Earth lists it at $3,919. 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

How it works →
A+
Exceptional
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,919 CAD|Low: $406 CAD|High: $3,975 CAD|Avg: $1,263 CAD|-1.4%
Brilliant Earth
Retailer 2
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Retailer 21
October 30, 2026
Retailer 8$406 CAD
Retailer 18$421 CAD
Retailer 4$451 CAD
Retailer 5$502 CAD
Retailer 17$672 CAD
Retailer 21$742 CAD
Retailer 9$752 CAD
Retailer 16$775 CAD
Retailer 7$808 CAD
Retailer 2$861 CAD
Retailer 15$1,097 CAD
Retailer 3$1,241 CAD
Retailer 19$1,386 CAD
Retailer 6$1,449 CAD
Retailer 12$1,456 CAD
Retailer 14$1,521 CAD
Retailer 10$1,749 CAD
Retailer 13$1,817 CAD
Retailer 11$1,937 CAD
Retailer 20$2,582 CAD
Brilliant Earth$3,919 CAD

40 data points across 21 retailers

23 retailers$364 CAD to $3,919 CAD

A+
Cheapest Retailer
-
$364 CAD
$260 USD
A
Retailer 2
-
$406 CAD
$290 USD
View
Final sale: no returns
A
Retailer 3
-
$421 CAD
$301 USD
View
A
Retailer 4
-
$451 CAD
$322 USD
View
A
Retailer 5
-
$451 CAD
$322 USD
View
A
Retailer 6
-
$502 CAD
HK$2,800 HKD
View
A
Retailer 7
-
$672 CAD
$480 USD
View
A
Retailer 8
-
$742 CAD
€505 EUR
View
A
Retailer 9
-
$752 CAD
$537 USD
View
A
Retailer 10
-
$775 CAD
ZAR 8,940 ZAR
View
A
Retailer 11
-
$808 CAD
$577 USD
View
A
Retailer 12
-
$861 CAD
£485 GBP
View
A
Retailer 13
-
$1,097 CAD
A$1,206 AUD
View
B+
Retailer 14
-
$1,241 CAD
$887 USD
View
B+
Retailer 15
-
$1,386 CAD
$990 USD
View
B+
Retailer 16
-
$1,449 CAD
$1,035 USD
View
B+
Retailer 17
-
$1,456 CAD
SGD 1,406 SGD
View
B+
Retailer 18
-
$1,521 CAD
$1,087 USD
View
B+
Retailer 19
-
$1,749 CAD
£984 GBP
View
B+
Retailer 20
-
$1,817 CAD
£1,022 GBP
View
B
Retailer 21
-
$1,937 CAD
$1,384 USD
View
Retailer 22
-
$2,582 CAD
$1,845 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
19067170A · Oct 29
$3,919 CAD
$2,800 USD
View
22 more retailers have this diamond
Prices start from $364 CADSave up to $3,555 CAD

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
$364 CAD