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Round|Lab Grown|IGI

1.20ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG617427829

Shape and cutting style on the report: Round brilliant

Certificate IGI LG617427829

Diamond specifications and retailer prices

From $505 NZD
As of November 5, 2026
Save $295 NZD (37%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,850 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG617427829 or 617427829. Listed at 6 retailers as of November 4, 2026, with a 58% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617427829
Dimensions6.82 × 6.76 × 4.16 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
6.82 mm6.76 mm1.20 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617427829
Side View
Table 58.0%Crown 35.7°Girdle: ThickPavilion 40.1°Culet: NoneDepth 61.3%

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 5
Current: $1,850 NZD|Low: $505 NZD|High: $1,862 NZD|Avg: $875 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$505 NZD
Retailer 4$644 NZD
Retailer 2$697 NZD
Retailer 3$765 NZD
Retailer 5$801 NZD
MOH London$1,850 NZD

42 data points across 6 retailers

6 retailers$505 NZD to $801 NZD

A
Cheapest Retailer
-
$505 NZD
A
Retailer 2
-
$644 NZD
View
B+
Retailer 3
-
$697 NZD
View
B+
Retailer 4
-
$765 NZD
View
B+
Retailer 5
-
$801 NZD
View
Most Expensive
MOH London
LG617427829 · Oct 29
$1,850 NZD
£819 GBP
View
Price last confirmed 8 days ago
5 more retailers have this diamond
Prices start from $505 NZDSave up to $295 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
1.20ct Round
$505 NZD