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Radiant|Lab Grown|IGI

1.56ct F IF Radiant Lab Grown Diamond

ID • F/IF • IGI LG620429386

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

Certificate IGI LG620429386

Diamond specifications and retailer prices

From $271 USD
As of November 2, 2026
Save $2,249 USD (89%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,830 USD at Brilliant Earth · As of October 21, 2026
View at Brilliant Earth

About this 1.56ct lab-grown radiant diamond

This 1.56ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG620429386 or 620429386. Listed at 21 retailers as of October 31, 2026, with a 830% 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

1.56
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle50.8°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620429386
Dimensions8.10 × 5.76 × 3.75 mm
L/W Ratio1.41
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
8.10 mm5.76 mm1.56 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620429386
Side View
Table 65.0%Crown 50.8°Girdle: MED-THKPavilion 33°Culet: NoneDepth 65.1%

Caratlytics Score

How it works →
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 2
Current: $2,520 USD|Low: $271 USD|High: $2,830 USD|Avg: $1,058 USD|-11.0%
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 2, 2026
Retailer 12$271 USD
Retailer 11$314 USD
Retailer 20$336 USD
Retailer 2$382 USD
Retailer 21$495 USD
Retailer 9$557 USD
Retailer 17$594 USD
Retailer 15$639 USD
Retailer 13$657 USD
Retailer 4$674 USD
Retailer 6$827 USD
Retailer 7$862 USD
Retailer 19$1,031 USD
Retailer 5$1,191 USD
Retailer 18$1,269 USD
Retailer 8$1,356 USD
Retailer 10$1,390 USD
Retailer 16$1,485 USD
Retailer 14$2,003 USD
Retailer 3$2,400 USD
Brilliant Earth$2,520 USD

8 data points across 21 retailers

21 retailers$271 USD to $2,520 USD

A
Cheapest Retailer
-
$271 USD
A
Retailer 2
-
$314 USD
View
A
Retailer 3
-
$336 USD
View
A
Retailer 4
-
$382 USD
£300 GBP
View
A
Retailer 5
-
$495 USD
View
A
Retailer 6
-
$557 USD
View
A
Retailer 7
-
$594 USD
€566 EUR
View
A
Retailer 8
-
$639 USD
ZAR 10,322 ZAR
View
A
Retailer 9
-
$657 USD
£518 GBP
View
A
Retailer 10
-
$674 USD
View
A
Retailer 11
-
$827 USD
View
B+
Retailer 12
-
$862 USD
A$1,326 AUD
View
B+
Retailer 13
-
$1,031 USD
View
B+
Retailer 14
-
$1,191 USD
View
B+
Retailer 15
-
$1,269 USD
View
B+
Retailer 16
-
$1,356 USD
View
B+
Retailer 17
-
$1,390 USD
SGD 1,878 SGD
View
B+
Retailer 18
-
$1,485 USD
£1,169 GBP
View
B
Retailer 19
-
$2,400 USD
View
B
Retailer 20
-
$2,520 USD
View
Most Expensive
Brilliant Earth
13715575B · Oct 21
$2,830 USD
View
Price last confirmed 11 days ago
20 more retailers have this diamond
Prices start from $271 USDSave up to $2,249 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
1.56ct Radiant
$271 USD