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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 $461 NZD
As of November 4, 2026
Save $4,240 NZD (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,701 NZD 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 $461 to $4,701, a $4,240 spread on the same certified stone. Brilliant Earth lists it at $4,701. 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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $4,701 NZD|Low: $461 NZD|High: $5,038 NZD|Avg: $1,512 NZD|-6.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 22
Retailer 23
November 5, 2026
Retailer 6$461 NZD
Retailer 9$514 NZD
Retailer 21$534 NZD
Retailer 4$571 NZD
Retailer 10$571 NZD
Retailer 5$635 NZD
Retailer 20$852 NZD
Retailer 18$942 NZD
Retailer 11$953 NZD
Retailer 17$986 NZD
Retailer 8$1,024 NZD
Retailer 2$1,080 NZD
Retailer 13$1,401 NZD
Retailer 3$1,574 NZD
Retailer 22$1,756 NZD
Retailer 7$1,836 NZD
Retailer 15$1,845 NZD
Retailer 16$1,927 NZD
Retailer 12$2,216 NZD
Retailer 19$2,301 NZD
Retailer 14$2,455 NZD
Retailer 23$3,273 NZD
Brilliant Earth$4,701 NZD

41 data points across 23 retailers

23 retailers$461 NZD to $4,701 NZD

A
Cheapest Retailer
-
$461 NZD
A
Retailer 2
-
$514 NZD
View
Final sale: no returns
A
Retailer 3
-
$534 NZD
View
Retailer 4
-
$571 NZD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$571 NZD
View
A
Retailer 6
-
$635 NZD
View
A
Retailer 7
-
$852 NZD
View
A
Retailer 8
-
$942 NZD
View
A
Retailer 9
-
$953 NZD
View
A
Retailer 10
-
$986 NZD
View
A
Retailer 11
-
$1,024 NZD
View
A
Retailer 12
-
$1,080 NZD
View
A
Retailer 13
-
$1,401 NZD
View
B+
Retailer 14
-
$1,574 NZD
View
B+
Retailer 15
-
$1,756 NZD
View
B+
Retailer 16
-
$1,836 NZD
View
B+
Retailer 17
-
$1,845 NZD
View
B+
Retailer 18
-
$1,927 NZD
View
B+
Retailer 19
-
$2,216 NZD
View
Retailer 20
-
$2,301 NZD
View
Price last confirmed 7 days ago
B
Retailer 21
-
$2,455 NZD
View
Retailer 22
-
$3,273 NZD
View
Price last confirmed 15 days ago
Most Expensive
B
Brilliant Earth
19067170A · Nov 4
$4,701 NZD
$2,650 USD
View
22 more retailers have this diamond
Prices start from $461 NZDSave up to $4,240 NZD

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
$461 NZD