Round|Lab Grown|IGI

1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG792617959

Shape and cutting style on the report: Round brilliant

Certificate IGI LG792617959

Diamond specifications and retailer prices

From $331 USD
As of October 30, 2026
Save $912 USD (73%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,243 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG792617959 or 792617959. Listed at 8 retailers as of October 30, 2026, with prices from $331 to $1,243, a $912 spread on the same certified stone. MOH London lists it at $1,243. 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

1.28
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792617959
Dimensions6.97 × 7.00 × 4.26 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
6.97 mm7.00 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG792617959
Side View
Table 60.0%Crown 34.8°Girdle: MediumPavilion 41°Culet: NoneDepth 60.9%

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: $1,243 USD|Low: $318 USD|High: $1,250 USD|Avg: $652 USD|+14.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 3$331 USD
Retailer 4$460 USD
Retailer 7$477 USD
Retailer 2$589 USD
Retailer 5$600 USD
Retailer 8$829 USD
Retailer 6$1,168 USD
MOH London$1,243 USD

28 data points across 8 retailers

8 retailers$331 USD to $1,243 USD

A
Cheapest Retailer
-
$331 USD
Retailer 2
-
$460 USD
View
Price last confirmed 10 days ago
B+
Retailer 3
-
$477 USD
View
B
Retailer 4
-
$589 USD
£464 GBP
View
B
Retailer 5
-
$600 USD
View
B
Retailer 6
-
$829 USD
View
B
Retailer 7
-
$1,168 USD
View
Most Expensive
B
MOH London
LG792617959 · Nov 1
$1,243 USD
£979 GBP
View
7 more retailers have this diamond
Prices start from $331 USDSave up to $912 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
1.28ct Round
$331 USD