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Round|Lab Grown|IGI

1.20ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG490195514

Shape and cutting style on the report: Round brilliant

Certificate IGI LG490195514

Diamond specifications and retailer prices

From $232 USD
As of October 28, 2026
Save $882 USD (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,114 USD 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG490195514 or 490195514. Listed at 8 retailers as of October 28, 2026, with prices from $232 to $1,114, a $882 spread on the same certified stone. MOH London lists it at $1,114. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490195514
Dimensions6.85 × 6.82 × 4.18 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.85 mm6.82 mm1.20 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490195514
Side View
Table 58.0%Crown 33.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.1%

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: Oct 28
Current: $1,114 USD|Low: $169 USD|High: $1,114 USD|Avg: $526 USD|+7.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8$232 USD
Retailer 5$237 USD
Retailer 3$381 USD
Retailer 6$415 USD
Retailer 2$430 USD
Retailer 4$557 USD
Retailer 7$815 USD
MOH London$1,114 USD

39 data points across 8 retailers

8 retailers$232 USD to $1,114 USD

A
Cheapest Retailer
-
$232 USD
Final sale: no returns
Retailer 2
-
$237 USD
View
Price last confirmed 13 days ago
B+
Retailer 3
-
$381 USD
View
B+
Retailer 4
-
$415 USD
View
B+
Retailer 5
-
$430 USD
£339 GBP
View
B+
Retailer 6
-
$557 USD
View
B
Retailer 7
-
$815 USD
View
Most Expensive
B
MOH London
LG490195514 · Oct 29
$1,114 USD
£877 GBP
View
7 more retailers have this diamond
Prices start from $232 USDSave up to $882 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
$232 USD