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Round|Lab Grown|IGI

1.25ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG830622757

Shape and cutting style on the report: Round brilliant

Certificate IGI LG830622757

Diamond specifications and retailer prices

From $577 AUD
As of November 5, 2026
Save $963 AUD (63%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,540 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG830622757 or 830622757. Listed at 6 retailers as of November 5, 2026, with prices from $577 to $1,540, a $963 spread on the same certified stone. MOH London lists it at $1,540. 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

1.25
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830622757
Dimensions6.86 × 6.88 × 4.29 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.86 mm6.88 mm1.25 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830622757
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 40.9°Culet: NoneDepth 62.5%

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: $1,540 AUD|Low: $541 AUD|High: $1,647 AUD|Avg: $753 AUD|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$554 AUD
Retailer 6$577 AUD
Retailer 3$580 AUD
Retailer 2$591 AUD
Retailer 5$700 AUD
MOH London$1,540 AUD

43 data points across 6 retailers

6 retailers$577 AUD to $1,540 AUD

Retailer 1
-
$554 AUD
Price last confirmed 8 days ago
A
Retailer 2
-
$577 AUD
View
A
Retailer 3
-
$580 AUD
View
A
Retailer 4
-
$591 AUD
View
B+
Retailer 5
-
$700 AUD
View
Most Expensive
B
MOH London
LG830622757 · Nov 5
$1,540 AUD
£849 GBP
View
5 more retailers have this diamond
Prices start from $577 AUDSave up to $963 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
1.25ct Round
$577 AUD