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Oval|Lab Grown|IGI

1.21ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG754518704

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG754518704

Diamond specifications and retailer prices

From $620 AUD
As of November 6, 2026
Save $960 AUD (61%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,580 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.21ct lab-grown oval diamond

This 1.21ct lab-grown oval 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 LG754518704 or 754518704. Listed at 5 retailers as of November 1, 2026, with prices from $620 to $1,580, a $960 spread on the same certified stone. MOH London lists it at $1,580. 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

1.21
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754518704
Dimensions8.35 × 6.06 × 3.79 mm
L/W Ratio1.38
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
8.35 mm6.06 mm1.21 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754518704
Side View
Table 61.0%Crown 35.9°Girdle: THN-MEDPavilion 40.7°Culet: NoneDepth 62.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,580 AUD|Low: $562 AUD|High: $1,615 AUD|Avg: $885 AUD|-2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3$620 AUD
Retailer 4$648 AUD
Retailer 2$653 AUD
Retailer 5$924 AUD
MOH London$1,580 AUD

43 data points across 5 retailers

5 retailers$620 AUD to $1,580 AUD

A
Cheapest Retailer
-
$620 AUD
A
Retailer 2
-
$648 AUD
View
A
Retailer 3
-
$653 AUD
View
B+
Retailer 4
-
$924 AUD
View
Most Expensive
B
MOH London
LG754518704 · Nov 1
$1,580 AUD
£855 GBP
View
4 more retailers have this diamond
Prices start from $620 AUDSave up to $960 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
1.21ct Oval
$620 AUD