Radiant|Lab Grown|IGI

1.31ct F FL Radiant Lab Grown Diamond

ID • F/FL • IGI LG818672082

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

Certificate IGI LG818672082

Diamond specifications and retailer prices

From €289 EUR
$323 USD
As of November 1, 2026
Save €1,823 EUR (86%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €2,453 EUR at Brilliant Earth · As of September 28, 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 F colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818672082 or 818672082. Listed at 20 retailers as of October 31, 2026, with a 631% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
F
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818672082
Dimensions7.45 × 5.51 × 3.88 mm
L/W Ratio1.35
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
7.45 mm5.51 mm1.31 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818672082
Side View
Table 62.0%Crown 36.8°Girdle: Slightly ThickPavilion 38.2°Culet: NoneDepth 70.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: €2,112 EUR|Low: €276 EUR|High: €2,372 EUR|Avg: €932 EUR|-10.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 13€289 EUR
Retailer 8€415 EUR
Retailer 12€479 EUR
Retailer 14€505 EUR
Retailer 9€527 EUR
Retailer 2€538 EUR
Retailer 11€567 EUR
Retailer 16€840 EUR
Retailer 15€939 EUR
Retailer 6€942 EUR
Retailer 4€1,028 EUR
Retailer 7€1,119 EUR
Retailer 3€1,187 EUR
Retailer 10€1,224 EUR
Retailer 5€1,651 EUR
Brilliant Earth€2,112 EUR

38 data points across 16 retailers

20 retailers€289 EUR to €2,112 EUR

A
Cheapest Retailer
-
€289 EUR
$323 USD
Final sale: no returns
Retailer 2
-
€321 EUR
$359 USD
View
Price last confirmed 30 days ago
Retailer 3
-
€388 EUR
$434 USD
View
Price last confirmed 35 days ago
Retailer 4
-
€415 EUR
$464 USD
View
Price last confirmed 29 days ago
A
Retailer 5
-
€479 EUR
$535 USD
View
A
Retailer 6
-
€505 EUR
$564 USD
View
A
Retailer 7
-
€527 EUR
ZAR 9,511 ZAR
View
A
Retailer 8
-
€538 EUR
£473 GBP
View
A
Retailer 9
-
€567 EUR
View
B+
Retailer 10
-
€840 EUR
$939 USD
View
B+
Retailer 11
-
€939 EUR
$1,049 USD
View
B+
Retailer 12
-
€942 EUR
$1,052 USD
View
B+
Retailer 13
-
€1,028 EUR
$1,148 USD
View
B+
Retailer 14
-
€1,119 EUR
SGD 1,689 SGD
View
B+
Retailer 15
-
€1,187 EUR
£1,044 GBP
View
B+
Retailer 16
-
€1,224 EUR
£1,077 GBP
View
Retailer 17
-
€1,335 EUR
$1,491 USD
View
Price last confirmed 32 days ago
B+
Retailer 18
-
€1,651 EUR
$1,845 USD
View
B
Retailer 19
-
€2,112 EUR
$2,360 USD
View
Most Expensive
Brilliant Earth
21094544A · Sep 28
€2,453 EUR
$2,740 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from €289 EURSave up to €1,823 EUR

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
€289 EUR