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Round|Lab Grown|IGI

1.20ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG487108268

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487108268

Diamond specifications and retailer prices

From $789 USD
As of November 1, 2026
Save $2,640 USD (77%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,429 USD at MOH London · As of November 3, 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 LG487108268 or 487108268. Listed at 12 retailers as of November 1, 2026, with prices from $789 to $3,429, a $2,640 spread on the same certified stone. MOH London lists it at $3,429. 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 angle34.9°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487108268
Dimensions6.78 × 6.75 × 4.23 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.78 mm6.75 mm1.20 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487108268
Side View
Table 57.0%Crown 34.9°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,429 USD|Low: $757 USD|High: $3,470 USD|Avg: $1,461 USD
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
November 2, 2026
Retailer 7$789 USD
Retailer 13$858 USD
Retailer 12$883 USD
Retailer 8$890 USD
Retailer 9$915 USD
Retailer 11$915 USD
Retailer 4$1,090 USD
Retailer 5$1,420 USD
Retailer 10$1,477 USD
Retailer 2$1,524 USD
Retailer 6$2,175 USD
Retailer 3$2,572 USD
MOH London$3,429 USD

42 data points across 13 retailers

12 retailers$789 USD to $3,429 USD

A
Cheapest Retailer
-
$789 USD
A
Retailer 2
-
$858 USD
View
A
Retailer 3
-
$883 USD
View
Final sale: no returns
A
Retailer 4
-
$890 USD
View
A
Retailer 5
-
$915 USD
View
Retailer 6
-
$915 USD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$1,090 USD
View
B+
Retailer 8
-
$1,477 USD
View
B+
Retailer 9
-
$1,524 USD
£1,200 GBP
View
B
Retailer 10
-
$2,175 USD
View
B
Retailer 11
-
$2,572 USD
View
Most Expensive
B
MOH London
LG487108268 · Nov 3
$3,429 USD
£2,700 GBP
View
11 more retailers have this diamond
Prices start from $789 USDSave up to $2,640 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
$789 USD