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Round|Lab Grown|IGI

1.20ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG490195514

Shape and cutting style on the report: Round brilliant

Certificate IGI LG490195514

Diamond specifications and retailer prices

From $330 AUD
$232 USD
As of October 30, 2026
Save $1,255 AUD (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,586 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG490195514 or 490195514. Listed at 8 retailers as of October 29, 2026, with prices from $330 to $1,586, a $1,255 spread on the same certified stone. MOH London lists it at $1,586. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490195514
Dimensions6.85 × 6.82 × 4.18 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.85 mm6.82 mm1.20 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490195514
Side View
Table 58.0%Crown 33.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.1%

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: $1,586 AUD|Low: $241 AUD|High: $1,586 AUD|Avg: $750 AUD|+7.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8$330 AUD
Retailer 5$337 AUD
Retailer 3$542 AUD
Retailer 6$591 AUD
Retailer 2$612 AUD
Retailer 4$793 AUD
Retailer 7$1,161 AUD
MOH London$1,586 AUD

38 data points across 8 retailers

8 retailers$330 AUD to $1,586 AUD

A
Cheapest Retailer
-
$330 AUD
$232 USD
Final sale: no returns
Retailer 2
-
$337 AUD
$237 USD
View
Price last confirmed 15 days ago
B+
Retailer 3
-
$542 AUD
$381 USD
View
B+
Retailer 4
-
$591 AUD
$415 USD
View
B+
Retailer 5
-
$612 AUD
£339 GBP
View
B+
Retailer 6
-
$793 AUD
$557 USD
View
B
Retailer 7
-
$1,161 AUD
$815 USD
View
Most Expensive
B
MOH London
LG490195514 · Oct 29
$1,586 AUD
£877 GBP
View
7 more retailers have this diamond
Prices start from $330 AUDSave up to $1,255 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
$330 AUD