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Round|Lab Grown|IGI

1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG814634689

Shape and cutting style on the report: Round brilliant

Certificate IGI LG814634689

Diamond specifications and retailer prices

From €269 EUR
$300 USD
As of October 30, 2026
Save €659 EUR (71%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €928 EUR at MOH London · As of October 26, 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 LG814634689 or 814634689. Listed at 6 retailers as of October 26, 2026, with prices from €269 to €928, a €659 spread on the same certified stone. MOH London lists it at €928. 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 angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG814634689
Dimensions6.96 × 6.92 × 4.28 mm
L/W Ratio1.01
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
6.96 mm6.92 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG814634689
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.6%

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: €928 EUR|Low: €269 EUR|High: €17,484 EUR|Avg: €908 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 4€269 EUR
Retailer 3€336 EUR
Retailer 2€355 EUR
Retailer 6€369 EUR
Retailer 5€685 EUR
MOH London€928 EUR

41 data points across 6 retailers

6 retailers€269 EUR to €928 EUR

B+
Cheapest Retailer
-
€269 EUR
$300 USD
A
Retailer 2
-
€336 EUR
View
A
Retailer 3
-
€355 EUR
£313 GBP
View
A
Retailer 4
-
€369 EUR
$412 USD
View
B
Retailer 5
-
€685 EUR
$766 USD
View
Most Expensive
B
MOH London
LG814634689 · Oct 26
€928 EUR
£816 GBP
View
5 more retailers have this diamond
Prices start from €269 EURSave up to €659 EUR

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
€269 EUR