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Radiant|Lab Grown|IGI

1.80ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG577399386

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

Certificate IGI LG577399386

Diamond specifications and retailer prices

From $730 NZD
$411 USD
As of November 1, 2026
Save $1,704 NZD (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,435 NZD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.8ct lab-grown radiant diamond

This 1.8ct 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 LG577399386 or 577399386. Listed at 11 retailers as of November 1, 2026, with prices from $730 to $2,435, a $1,704 spread on the same certified stone. Brilliant Earth lists it at $2,435. 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

1.80
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG577399386
Dimensions8.76 × 5.92 × 4.04 mm
L/W Ratio1.48
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.76 mm5.92 mm1.80 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG577399386
Side View
Table 66.0%Crown 43.2°Girdle: MediumPavilion 35.1°Culet: NoneDepth 68.2%

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 1
Current: $2,435 NZD|Low: $375 NZD|High: $2,542 NZD|Avg: $1,151 NZD|-4.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 3$375 NZD
Retailer 11$416 NZD
Retailer 10$730 NZD
Retailer 5$745 NZD
Retailer 2$749 NZD
Retailer 9$1,029 NZD
Retailer 8$1,100 NZD
Retailer 6$1,342 NZD
Retailer 4$1,946 NZD
Retailer 7$1,946 NZD
Brilliant Earth$2,435 NZD

38 data points across 11 retailers

11 retailers$730 NZD to $2,435 NZD

Retailer 1
-
$389 NZD
$219 USD
Price last confirmed 36 days ago
Retailer 2
-
$411 NZD
$231 USD
View
Price last confirmed 36 days ago
B+
Retailer 3
-
$730 NZD
$411 USD
View
A
Retailer 4
-
$745 NZD
€399 EUR
View
A
Retailer 5
-
$749 NZD
£332 GBP
View
A
Retailer 6
-
$1,029 NZD
$579 USD
View
A
Retailer 7
-
$1,100 NZD
$619 USD
View
B+
Retailer 8
-
$1,342 NZD
$755 USD
View
B+
Retailer 9
-
$1,946 NZD
£862 GBP
View
B
Retailer 10
-
$1,946 NZD
$1,095 USD
View
Most Expensive
B
Brilliant Earth
7624068A · Nov 2
$2,435 NZD
$1,370 USD
View
10 more retailers have this diamond
Prices start from $730 NZDSave up to $1,704 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
1.80ct Radiant
$730 NZD