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Radiant|Lab Grown|IGI

1.55ct F IF Radiant Lab Grown Diamond

EX • F/IF • IGI LG818630033

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

Certificate IGI LG818630033

Diamond specifications and retailer prices

From $234 USD
As of November 6, 2026
Save $2,266 USD (91%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,500 USD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct 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 LG818630033 or 818630033. Listed at 20 retailers as of November 6, 2026, with prices from $234 to $2,500, a $2,266 spread on the same certified stone. Brilliant Earth lists it at $2,500. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
F
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle51.9°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818630033
Dimensions8.29 × 5.83 × 3.84 mm
L/W Ratio1.42
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
8.29 mm5.83 mm1.55 ctF / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818630033
Side View
Table 62.0%Crown 51.9°Girdle: MediumPavilion 37.8°Culet: NoneDepth 65.9%

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 6
Current: $542 USD|Low: $234 USD|High: $2,250 USD|Avg: $942 USD|-17.6%
Retailer 1
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
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 7, 2026
Retailer 18$234 USD
Retailer 7$262 USD
Retailer 17$271 USD
Retailer 19$290 USD
Retailer 9$491 USD
Retailer 1$542 USD
Retailer 12$603 USD
Retailer 14$749 USD
Retailer 15$798 USD
Retailer 6$809 USD
Retailer 2$1,029 USD
Retailer 4$1,180 USD
Retailer 8$1,198 USD
Retailer 10$1,238 USD
Retailer 5$1,249 USD
Retailer 13$1,280 USD
Retailer 11$1,301 USD
Retailer 16$1,790 USD
Retailer 3$2,250 USD

46 data points across 19 retailers

20 retailers$234 USD to $2,500 USD

A
Cheapest Retailer
-
$234 USD
A
Retailer 2
-
$262 USD
View
Final sale: no returns
A
Retailer 3
-
$271 USD
View
A
Retailer 4
-
$290 USD
View
A
Retailer 5
-
$491 USD
View
A
Retailer 6
-
$542 USD
View
A
Retailer 7
-
$603 USD
View
A
Retailer 8
-
$749 USD
View
B+
Retailer 9
-
$798 USD
View
A
Retailer 10
-
$809 USD
View
B+
Retailer 11
-
$1,029 USD
View
B+
Retailer 12
-
$1,180 USD
View
B+
Retailer 13
-
$1,198 USD
View
B+
Retailer 14
-
$1,238 USD
View
B+
Retailer 15
-
$1,249 USD
View
B+
Retailer 16
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$1,280 USD
View
Retailer 17
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$1,301 USD
View
Price last confirmed 30 days ago
Retailer 18
-
$1,790 USD
View
Price last confirmed 20 days ago
B
Retailer 19
-
$2,250 USD
View
Most Expensive
B
Brilliant Earth
22138650Y · Nov 6
$2,500 USD
View
19 more retailers have this diamond
Prices start from $234 USDSave up to $2,266 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
1.55ct Radiant
$234 USD