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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 €152 EUR
As of November 5, 2026
Save €731 EUR (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €884 EUR at MOH London · As of November 2, 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 2, 2026, with prices from €152 to €884, a €731 spread on the same certified stone. MOH London lists it at €884. 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
Colour
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 5
Current: €884 EUR|Low: €146 EUR|High: €894 EUR|Avg: €415 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 6, 2026
Retailer 14€152 EUR
Retailer 15€176 EUR
Retailer 3€189 EUR
Retailer 4€189 EUR
Retailer 2€324 EUR
Retailer 11€332 EUR
Retailer 16€338 EUR
Retailer 12€379 EUR
Retailer 7€405 EUR
Retailer 6€413 EUR
Retailer 9€418 EUR
Retailer 13€480 EUR
Retailer 10€570 EUR
Retailer 5€608 EUR
Retailer 8€656 EUR
MOH London€884 EUR

34 data points across 16 retailers

16 retailers€152 EUR to €884 EUR

A
Cheapest Retailer
-
€152 EUR
A
Retailer 2
-
€176 EUR
View
Retailer 3
-
€189 EUR
View
Price last confirmed 12 days ago
A
Retailer 4
-
€189 EUR
View
A
Retailer 5
-
€324 EUR
View
A
Retailer 6
-
€332 EUR
View
B+
Retailer 7
-
€338 EUR
View
A
Retailer 8
-
€379 EUR
View
B+
Retailer 9
-
€405 EUR
View
B+
Retailer 10
-
€413 EUR
View
A
Retailer 11
-
€418 EUR
View
B+
Retailer 12
-
€480 EUR
View
B
Retailer 13
-
€570 EUR
View
B
Retailer 14
-
€608 EUR
View
B+
Retailer 15
-
€656 EUR
View
Most Expensive
B
MOH London
LG818686822 · Nov 2
€884 EUR
£781 GBP
View
15 more retailers have this diamond
Prices start from €152 EURSave up to €731 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
€152 EUR