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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 $191 USD
As of November 1, 2026
Save $916 USD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,107 USD at MOH London · As of November 2, 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 November 1, 2026, with prices from $191 to $1,107, a $916 spread on the same certified stone. MOH London lists it at $1,107. 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

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: Nov 1
Current: $1,107 USD|Low: $191 USD|High: $1,121 USD|Avg: $523 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7$191 USD
Retailer 9$237 USD
Retailer 5$369 USD
Retailer 11$392 USD
Retailer 10$415 USD
Retailer 6$430 USD
Retailer 4$437 USD
Retailer 8$540 USD
Retailer 2$613 USD
Retailer 3$815 USD
MOH London$1,107 USD

30 data points across 11 retailers

15 retailers$191 USD to $1,107 USD

A
Cheapest Retailer
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$191 USD
A
Retailer 2
-
$222 USD
View
Retailer 3
-
$237 USD
View
Price last confirmed 8 days ago
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Retailer 4
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$237 USD
View
A
Retailer 5
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$369 USD
£291 GBP
View
A
Retailer 6
-
$392 USD
View
A
Retailer 7
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$415 USD
View
A
Retailer 8
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$430 USD
View
A
Retailer 9
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$437 USD
€416 EUR
View
A
Retailer 10
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$540 USD
View
A
Retailer 11
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$613 USD
View
Retailer 12
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$695 USD
View
Price last confirmed 47 days ago
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Retailer 13
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$762 USD
View
A
Retailer 14
-
$815 USD
View
Most Expensive
A
MOH London
LG811647134 · Nov 2
$1,107 USD
£872 GBP
View
14 more retailers have this diamond
Prices start from $191 USDSave up to $916 USD

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
$191 USD