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Round|Lab Grown|IGI

1.20ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG811647134

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811647134

Diamond specifications and retailer prices

From $273 AUD
As of November 5, 2026
Save $1,306 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,578 AUD at MOH London · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG811647134 or 811647134. Listed at 15 retailers as of November 5, 2026, with prices from $273 to $1,578, a $1,306 spread on the same certified stone. MOH London lists it at $1,578. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811647134
Dimensions6.84 × 6.82 × 4.15 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.84 mm6.82 mm1.20 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811647134
Side View
Table 58.0%Crown 34.3°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 60.7%

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: $1,578 AUD|Low: $273 AUD|High: $1,602 AUD|Avg: $745 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8$273 AUD
Retailer 9$339 AUD
Retailer 2$524 AUD
Retailer 11$560 AUD
Retailer 10$593 AUD
Retailer 4$620 AUD
Retailer 6$629 AUD
Retailer 5$771 AUD
Retailer 7$1,091 AUD
Retailer 3$1,164 AUD
MOH London$1,578 AUD

33 data points across 11 retailers

15 retailers$273 AUD to $1,578 AUD

A
Cheapest Retailer
-
$273 AUD
A
Retailer 2
-
$317 AUD
View
Retailer 3
-
$339 AUD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$339 AUD
View
A
Retailer 5
-
$524 AUD
View
A
Retailer 6
-
$560 AUD
View
A
Retailer 7
-
$593 AUD
View
A
Retailer 8
-
$620 AUD
View
A
Retailer 9
-
$629 AUD
View
A
Retailer 10
-
$771 AUD
View
A
Retailer 11
-
$876 AUD
View
A
Retailer 12
-
$1,089 AUD
View
A
Retailer 13
-
$1,091 AUD
View
A
Retailer 14
-
$1,164 AUD
View
Most Expensive
A
MOH London
LG811647134 · Nov 5
$1,578 AUD
£870 GBP
View
14 more retailers have this diamond
Prices start from $273 AUDSave up to $1,306 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
$273 AUD