Radiant|Lab Grown|IGI

1.55ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG512214411

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

Certificate IGI LG512214411

Diamond specifications and retailer prices

From $264 USD
As of November 6, 2026
Save $1,996 USD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,260 USD at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512214411 or 512214411. Listed at 15 retailers as of November 6, 2026, with prices from $264 to $2,260, a $1,996 spread on the same certified stone. Do Amore Diamonds lists it at $2,260. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.2°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512214411
Dimensions8.33 × 5.78 × 3.77 mm
L/W Ratio1.44
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
8.33 mm5.78 mm1.55 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512214411
Side View
Table 61.5%Crown 42.2°Girdle: Slightly ThickPavilion 34.6°Culet: NoneDepth 65.2%

Caratlytics Score

How it works →
A
Excellent
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: Nov 6
Current: $615 USD|Low: $264 USD|High: $1,680 USD|Avg: $762 USD|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 8$264 USD
Retailer 9$384 USD
Retailer 6$394 USD
Retailer 1$615 USD
Retailer 3$720 USD
Retailer 7$966 USD
Retailer 2$1,287 USD
Retailer 4$1,377 USD
Retailer 5$1,680 USD

42 data points across 9 retailers

15 retailers$264 USD to $2,260 USD

Retailer 1
-
$226 USD
Price last confirmed 36 days ago
A
Retailer 2
-
$264 USD
View
Final sale: no returns
Retailer 3
-
$273 USD
View
Price last confirmed 41 days ago
Retailer 4
-
$288 USD
View
Price last confirmed 41 days ago
Retailer 5
-
$292 USD
View
Price last confirmed 35 days ago
A
Retailer 6
-
$384 USD
View
B+
Retailer 7
-
$394 USD
View
A
Retailer 8
-
$615 USD
View
B+
Retailer 9
-
$720 USD
View
B
Retailer 10
-
$966 USD
View
Retailer 11
-
$1,036 USD
View
Price last confirmed 38 days ago
B
Retailer 12
-
$1,287 USD
View
B
Retailer 13
-
$1,377 USD
View
B
Retailer 14
-
$1,680 USD
View
Most Expensive
B
Do Amore Diamonds
27-D56BA13EA · Nov 6
$2,260 USD
View
14 more retailers have this diamond
Prices start from $264 USDSave up to $1,996 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
$264 USD