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1.80ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG500151236

Shape and cutting style on the report: Round brilliant

Certificate IGI LG500151236

Diamond specifications and retailer prices

From $1,792 NZD
$1,010 USD
As of October 30, 2026
Save $6,532 NZD (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $8,324 NZD at MOH London · As of October 29, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG500151236 or 500151236. Listed at 10 retailers as of October 29, 2026, with prices from $1,792 to $8,324, a $6,532 spread on the same certified stone. MOH London lists it at $8,324. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500151236
Dimensions7.74 × 7.66 × 4.85 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
7.74 mm7.66 mm1.80 ctJ / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500151236
Side View
Table 55.0%Crown 36.1°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 63.0%

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: Oct 30
Current: $8,324 NZD|Low: $1,778 NZD|High: $8,392 NZD|Avg: $3,870 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2$1,792 NZD
Retailer 5$2,221 NZD
Retailer 9$2,417 NZD
Retailer 8$2,488 NZD
Retailer 6$2,576 NZD
Retailer 12$3,591 NZD
Retailer 3$3,749 NZD
Retailer 7$4,084 NZD
Retailer 11$4,803 NZD
Retailer 10$4,831 NZD
Retailer 4$5,763 NZD
MOH London$8,324 NZD

14 data points across 12 retailers

10 retailers$1,792 NZD to $8,324 NZD

A
Cheapest Retailer
-
$1,792 NZD
$1,010 USD
B+
Retailer 2
-
$2,221 NZD
$1,252 USD
View
B+
Retailer 3
-
$2,417 NZD
$1,362 USD
View
B+
Retailer 4
-
$2,488 NZD
$1,402 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,576 NZD
$1,452 USD
View
Retailer 6
-
$2,576 NZD
$1,452 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
$4,084 NZD
$2,302 USD
View
B
Retailer 8
-
$4,803 NZD
$2,707 USD
View
B
Retailer 9
-
$4,831 NZD
$2,723 USD
View
Most Expensive
B
MOH London
LG500151236 · Oct 29
$8,324 NZD
£3,694 GBP
View
9 more retailers have this diamond
Prices start from $1,792 NZDSave up to $6,532 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