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Round|Lab Grown|IGI

1.80ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG492134037

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492134037

Diamond specifications and retailer prices

From $1,792 NZD
$1,010 USD
As of October 30, 2026
Save $6,376 NZD (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,168 NZD at MOH London · As of October 27, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492134037 or 492134037. Listed at 12 retailers as of October 27, 2026, with prices from $1,792 to $8,168, a $6,376 spread on the same certified stone. MOH London lists it at $8,168. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492134037
Dimensions7.69 × 7.72 × 4.87 mm
L/W Ratio1.00
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
7.69 mm7.72 mm1.80 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492134037
Side View
Table 55.5%Crown 36.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.2%

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: Oct 30
Current: $8,168 NZD|Low: $1,792 NZD|High: $8,254 NZD|Avg: $3,838 NZD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 2$1,792 NZD
Retailer 7$2,463 NZD
Retailer 11$2,679 NZD
Retailer 10$2,757 NZD
Retailer 8$2,857 NZD
Retailer 13$2,857 NZD
Retailer 3$3,158 NZD
Retailer 6$3,749 NZD
Retailer 5$3,923 NZD
Retailer 9$4,510 NZD
Retailer 4$5,183 NZD
Retailer 12$5,353 NZD
MOH London$8,168 NZD

38 data points across 13 retailers

12 retailers$1,792 NZD to $8,168 NZD

A
Cheapest Retailer
-
$1,792 NZD
$1,010 USD
B+
Retailer 2
-
$2,463 NZD
$1,388 USD
View
B+
Retailer 3
-
$2,679 NZD
$1,510 USD
View
B+
Retailer 4
-
$2,757 NZD
$1,554 USD
View
Final sale: no returns
Retailer 5
-
$2,857 NZD
$1,610 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$2,857 NZD
$1,610 USD
View
B+
Retailer 7
-
$3,158 NZD
$1,780 USD
View
B+
Retailer 8
-
$3,749 NZD
£1,664 GBP
View
B
Retailer 9
-
$4,510 NZD
$2,542 USD
View
B
Retailer 10
-
$5,183 NZD
$2,921 USD
View
B
Retailer 11
-
$5,353 NZD
$3,017 USD
View
Most Expensive
B
MOH London
LG492134037 · Oct 27
$8,168 NZD
£3,625 GBP
View
11 more retailers have this diamond
Prices start from $1,792 NZDSave up to $6,376 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
$1,792 NZD