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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 $476 NZD
As of November 6, 2026
Save $3,601 NZD (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,077 NZD 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 $476 to $4,077, a $3,601 spread on the same certified stone. Do Amore Diamonds lists it at $4,077. 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
Colour
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

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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 6
Current: $1,109 NZD|Low: $476 NZD|High: $3,031 NZD|Avg: $1,375 NZD|+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$476 NZD
Retailer 9$693 NZD
Retailer 6$711 NZD
Retailer 1$1,109 NZD
Retailer 3$1,299 NZD
Retailer 7$1,743 NZD
Retailer 2$2,322 NZD
Retailer 4$2,484 NZD
Retailer 5$3,031 NZD

42 data points across 9 retailers

15 retailers$476 NZD to $4,077 NZD

Retailer 1
-
$408 NZD
Price last confirmed 36 days ago
A
Retailer 2
-
$476 NZD
View
Final sale: no returns
Retailer 3
-
$492 NZD
View
Price last confirmed 41 days ago
Retailer 4
-
$520 NZD
View
Price last confirmed 41 days ago
Retailer 5
-
$527 NZD
View
Price last confirmed 35 days ago
A
Retailer 6
-
$693 NZD
View
B+
Retailer 7
-
$711 NZD
View
A
Retailer 8
-
$1,109 NZD
View
B+
Retailer 9
-
$1,299 NZD
View
B
Retailer 10
-
$1,743 NZD
View
Retailer 11
-
$1,869 NZD
View
Price last confirmed 38 days ago
B
Retailer 12
-
$2,322 NZD
View
B
Retailer 13
-
$2,484 NZD
View
B
Retailer 14
-
$3,031 NZD
View
Most Expensive
B
Do Amore Diamonds
27-D56BA13EA · Nov 6
$4,077 NZD
$2,260 USD
View
14 more retailers have this diamond
Prices start from $476 NZDSave up to $3,601 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
1.55ct Radiant
$476 NZD