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1.80ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG571300298

Shape and cutting style on the report: Round brilliant

Certificate IGI LG571300298

Diamond specifications and retailer prices

From $649 NZD
$365 USD
As of November 1, 2026
Save $1,326 NZD (67%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,975 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.8ct lab-grown round diamond

This 1.8ct lab-grown round 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 LG571300298 or 571300298. Listed at 11 retailers as of November 1, 2026, with prices from $649 to $1,975, a $1,326 spread on the same certified stone. MOH London lists it at $1,975. 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 angle33.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG571300298
Dimensions7.91 × 7.85 × 4.75 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.91 mm7.85 mm1.80 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG571300298
Side View
Table 58.0%Crown 33.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.2%

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 1
Current: $1,975 NZD|Low: $325 NZD|High: $2,047 NZD|Avg: $1,071 NZD|-2.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8$457 NZD
Retailer 9$505 NZD
Retailer 7$649 NZD
Retailer 2$916 NZD
Retailer 5$963 NZD
Retailer 6$1,029 NZD
Retailer 4$1,591 NZD
Retailer 3$1,626 NZD
MOH London$1,975 NZD

38 data points across 9 retailers

11 retailers$649 NZD to $1,975 NZD

Retailer 1
-
$407 NZD
$229 USD
Price last confirmed 34 days ago
Retailer 2
-
$473 NZD
$266 USD
View
Price last confirmed 41 days ago
Retailer 3
-
$498 NZD
$280 USD
View
Price last confirmed 34 days ago
B+
Retailer 4
-
$649 NZD
$365 USD
View
A
Retailer 5
-
$916 NZD
£406 GBP
View
A
Retailer 6
-
$963 NZD
$542 USD
View
A
Retailer 7
-
$1,029 NZD
$579 USD
View
B
Retailer 8
-
$1,591 NZD
$895 USD
View
Retailer 9
-
$1,623 NZD
$913 USD
View
Price last confirmed 33 days ago
B+
Retailer 10
-
$1,626 NZD
$915 USD
View
Most Expensive
B
MOH London
LG571300298 · Nov 1
$1,975 NZD
£875 GBP
View
10 more retailers have this diamond
Prices start from $649 NZDSave up to $1,326 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 Round
$649 NZD