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Round|Lab Grown|IGI

1.20ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG811647134

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811647134

Diamond specifications and retailer prices

From €171 EUR
$191 USD
As of October 29, 2026
Save €826 EUR (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €997 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG811647134 or 811647134. Listed at 15 retailers as of October 29, 2026, with prices from €171 to €997, a €826 spread on the same certified stone. MOH London lists it at €997. 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

1.20
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811647134
Dimensions6.84 × 6.82 × 4.15 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
6.84 mm6.82 mm1.20 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811647134
Side View
Table 58.0%Crown 34.3°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 60.7%

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: Oct 29
Current: €997 EUR|Low: €171 EUR|High: €1,004 EUR|Avg: €469 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
October 31, 2026
Retailer 7€171 EUR
Retailer 9€212 EUR
Retailer 4€331 EUR
Retailer 11€351 EUR
Retailer 10€371 EUR
Retailer 5€385 EUR
Retailer 2€390 EUR
Retailer 8€483 EUR
Retailer 6€542 EUR
Retailer 3€730 EUR
MOH London€997 EUR

28 data points across 11 retailers

15 retailers€171 EUR to €997 EUR

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Cheapest Retailer
-
€171 EUR
$191 USD
A
Retailer 2
-
€199 EUR
$222 USD
View
A
Retailer 3
-
€212 EUR
$237 USD
View
A
Retailer 4
-
€212 EUR
$237 USD
View
A
Retailer 5
-
€331 EUR
£292 GBP
View
A
Retailer 6
-
€351 EUR
$392 USD
View
A
Retailer 7
-
€371 EUR
$415 USD
View
A
Retailer 8
-
€385 EUR
$430 USD
View
A
Retailer 9
-
€390 EUR
View
A
Retailer 10
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€483 EUR
$540 USD
View
A
Retailer 11
-
€542 EUR
$606 USD
View
Retailer 12
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€622 EUR
$695 USD
View
Price last confirmed 45 days ago
A
Retailer 13
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€682 EUR
$762 USD
View
A
Retailer 14
-
€730 EUR
$815 USD
View
Most Expensive
A
MOH London
LG811647134 · Oct 29
€997 EUR
£877 GBP
View
14 more retailers have this diamond
Prices start from €171 EURSave up to €826 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
1.20ct Round
€171 EUR