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Round|Lab Grown|IGI

1.28ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686822

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686822

Diamond specifications and retailer prices

From €153 EUR
$171 USD
As of November 1, 2026
Save €735 EUR (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €888 EUR 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686822 or 818686822. Listed at 16 retailers as of November 1, 2026, with prices from €153 to €888, a €735 spread on the same certified stone. MOH London lists it at €888. 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 angle34.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686822
Dimensions6.99 × 7.00 × 4.28 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 mm7.00 mm1.28 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686822
Side View
Table 58.0%Crown 34.4°Girdle: MediumPavilion 41°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: €888 EUR|Low: €147 EUR|High: €898 EUR|Avg: €418 EUR|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 13€153 EUR
Retailer 15€177 EUR
Retailer 3€190 EUR
Retailer 4€190 EUR
Retailer 10€328 EUR
Retailer 9€338 EUR
Retailer 16€339 EUR
Retailer 7€407 EUR
Retailer 6€415 EUR
Retailer 12€421 EUR
Retailer 2€423 EUR
Retailer 11€476 EUR
Retailer 14€519 EUR
Retailer 5€610 EUR
Retailer 8€659 EUR
MOH London€888 EUR

29 data points across 16 retailers

16 retailers€153 EUR to €888 EUR

A
Cheapest Retailer
-
€153 EUR
$171 USD
A
Retailer 2
-
€177 EUR
$198 USD
View
Retailer 3
-
€190 EUR
$212 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
€190 EUR
$212 USD
View
A
Retailer 5
-
€328 EUR
View
A
Retailer 6
-
€338 EUR
£297 GBP
View
B+
Retailer 7
-
€339 EUR
$379 USD
View
B+
Retailer 8
-
€407 EUR
$455 USD
View
B+
Retailer 9
-
€415 EUR
$464 USD
View
Retailer 10
-
€421 EUR
$470 USD
View
Price last confirmed 10 days ago
A
Retailer 11
-
€423 EUR
£372 GBP
View
B+
Retailer 12
-
€476 EUR
$532 USD
View
B+
Retailer 13
-
€519 EUR
$580 USD
View
B
Retailer 14
-
€610 EUR
$682 USD
View
B+
Retailer 15
-
€659 EUR
$736 USD
View
Most Expensive
B
MOH London
LG818686822 · Nov 1
€888 EUR
£781 GBP
View
15 more retailers have this diamond
Prices start from €153 EURSave up to €735 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
€153 EUR