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Round|Lab Grown|IGI

1.25ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG517289198

Shape and cutting style on the report: Round brilliant

Certificate IGI LG517289198

Diamond specifications and retailer prices

From $237 CAD
As of November 5, 2026
Save $1,135 CAD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,373 CAD at MOH London · As of November 2, 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 LG517289198 or 517289198. Listed at 17 retailers as of November 2, 2026, with prices from $237 to $1,373, a $1,135 spread on the same certified stone. MOH London lists it at $1,373. 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
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517289198
Dimensions6.89 × 6.85 × 4.27 mm
L/W Ratio1.01
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
6.89 mm6.85 mm1.25 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517289198
Side View
Table 55.0%Crown 35.5°Girdle: MediumPavilion 40.4°Culet: NoneDepth 62.1%

Caratlytics Score

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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: $1,373 CAD|Low: $228 CAD|High: $1,389 CAD|Avg: $627 CAD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7$237 CAD
Retailer 10$265 CAD
Retailer 8$293 CAD
Retailer 4$506 CAD
Retailer 2$517 CAD
Retailer 3$575 CAD
Retailer 9$644 CAD
Retailer 5$965 CAD
Retailer 6$997 CAD
MOH London$1,373 CAD

44 data points across 10 retailers

17 retailers$237 CAD to $1,373 CAD

A
Cheapest Retailer
-
$237 CAD
A
Retailer 2
-
$265 CAD
View
Final sale: no returns
A
Retailer 3
-
$275 CAD
View
Retailer 4
-
$293 CAD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$293 CAD
View
A
Retailer 6
-
$339 CAD
View
B+
Retailer 7
-
$402 CAD
View
A
Retailer 8
-
$506 CAD
View
A
Retailer 9
-
$517 CAD
View
A
Retailer 10
-
$557 CAD
View
A
Retailer 11
-
$575 CAD
View
B+
Retailer 12
-
$644 CAD
View
Retailer 13
-
$705 CAD
View
Price last confirmed 58 days ago
B
Retailer 14
-
$944 CAD
View
B
Retailer 15
-
$965 CAD
View
B
Retailer 16
-
$997 CAD
View
Most Expensive
B
MOH London
LG517289198 · Nov 2
$1,373 CAD
£774 GBP
View
16 more retailers have this diamond
Prices start from $237 CADSave up to $1,135 CAD

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
$237 CAD