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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 $406 AUD
As of November 5, 2026
Save $237 AUD (37%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,486 AUD 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $1,486 AUD|Low: $406 AUD|High: $1,495 AUD|Avg: $703 AUD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$406 AUD
Retailer 4$517 AUD
Retailer 2$560 AUD
Retailer 3$614 AUD
Retailer 5$643 AUD
MOH London$1,486 AUD

42 data points across 6 retailers

6 retailers$406 AUD to $643 AUD

A
Cheapest Retailer
-
$406 AUD
A
Retailer 2
-
$517 AUD
View
B+
Retailer 3
-
$560 AUD
View
B+
Retailer 4
-
$614 AUD
View
B+
Retailer 5
-
$643 AUD
View
Most Expensive
MOH London
LG617427829 · Oct 29
$1,486 AUD
£819 GBP
View
Price last confirmed 8 days ago
5 more retailers have this diamond
Prices start from $406 AUDSave up to $237 AUD

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
$406 AUD