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Round|Lab Grown|IGI

1.25ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG781613089

Shape and cutting style on the report: Round brilliant

Certificate IGI LG781613089

Diamond specifications and retailer prices

From $384 USD
As of November 5, 2026
Save $629 USD (62%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,013 USD 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 LG781613089 or 781613089. Listed at 6 retailers as of November 5, 2026, with prices from $384 to $1,013, a $629 spread on the same certified stone. MOH London lists it at $1,013. 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 angle34°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781613089
Dimensions6.96 × 6.94 × 4.19 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
6.96 mm6.94 mm1.25 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781613089
Side View
Table 59.0%Crown 34°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.3%

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: $1,013 USD|Low: $346 USD|High: $1,039 USD|Avg: $532 USD|+4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 2$384 USD
Retailer 6$386 USD
Retailer 3$400 USD
Retailer 4$490 USD
Retailer 5$542 USD
MOH London$1,013 USD

42 data points across 6 retailers

6 retailers$384 USD to $1,013 USD

A
Cheapest Retailer
-
$384 USD
A
Retailer 2
-
$386 USD
View
A
Retailer 3
-
$400 USD
View
B+
Retailer 4
-
$490 USD
View
B+
Retailer 5
-
$542 USD
View
Most Expensive
B
MOH London
LG781613089 · Nov 5
$1,013 USD
£798 GBP
View
5 more retailers have this diamond
Prices start from $384 USDSave up to $629 USD

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
$384 USD