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Round|Lab Grown|IGI

1.28ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG819612892

Shape and cutting style on the report: Round brilliant

Certificate IGI LG819612892

Diamond specifications and retailer prices

From €155 EUR
$173 USD
As of November 1, 2026
Save €748 EUR (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €903 EUR at MOH London · As of October 29, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG819612892 or 819612892. Listed at 13 retailers as of October 29, 2026, with prices from €155 to €903, a €748 spread on the same certified stone. MOH London lists it at €903. 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
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819612892
Dimensions6.99 × 6.97 × 4.27 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
6.99 mm6.97 mm1.28 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819612892
Side View
Table 59.0%Crown 34.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.2%

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 1
Current: €903 EUR|Low: €149 EUR|High: €908 EUR|Avg: €388 EUR|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6€155 EUR
Retailer 8€180 EUR
Retailer 7€192 EUR
Retailer 11€192 EUR
Retailer 9€342 EUR
Retailer 4€342 EUR
Retailer 2€427 EUR
Retailer 3€484 EUR
Retailer 10€617 EUR
Retailer 5€652 EUR
MOH London€903 EUR

46 data points across 11 retailers

13 retailers€155 EUR to €903 EUR

A
Cheapest Retailer
-
€155 EUR
$173 USD
A
Retailer 2
-
€180 EUR
$201 USD
View
Retailer 3
-
€192 EUR
$214 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
€192 EUR
$214 USD
View
B+
Retailer 5
-
€342 EUR
$382 USD
View
A
Retailer 6
-
€342 EUR
£301 GBP
View
B+
Retailer 7
-
€407 EUR
$455 USD
View
A
Retailer 8
-
€427 EUR
£376 GBP
View
B+
Retailer 9
-
€484 EUR
$541 USD
View
B+
Retailer 10
-
€617 EUR
$689 USD
View
B+
Retailer 11
-
€652 EUR
$728 USD
View
B
Retailer 12
-
€666 EUR
$744 USD
View
Most Expensive
B
MOH London
LG819612892 · Oct 29
€903 EUR
£794 GBP
View
12 more retailers have this diamond
Prices start from €155 EURSave up to €748 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
€155 EUR