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Round|Lab Grown|IGI

1.20ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG786690205

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786690205

Diamond specifications and retailer prices

From $148 USD
As of October 29, 2026
Save $708 USD (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $856 USD at MOH London · As of November 1, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG786690205 or 786690205. Listed at 9 retailers as of October 29, 2026, with prices from $148 to $856, a $708 spread on the same certified stone. MOH London lists it at $856. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786690205
Dimensions6.83 × 6.78 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.83 mm6.78 mm1.20 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786690205
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.5%

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 29
Current: $856 USD|Low: $140 USD|High: $860 USD|Avg: $477 USD|+2.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7$148 USD
Retailer 5$171 USD
Retailer 12$302 USD
Retailer 2$323 USD
Retailer 9$358 USD
Retailer 3$506 USD
Retailer 10$510 USD
Retailer 8$588 USD
Retailer 6$621 USD
Retailer 4$651 USD
Retailer 11$733 USD
MOH London$856 USD

31 data points across 12 retailers

9 retailers$148 USD to $856 USD

A
Cheapest Retailer
-
$148 USD
A
Retailer 2
-
$171 USD
View
A
Retailer 3
-
$323 USD
€308 EUR
View
Retailer 4
-
$358 USD
£282 GBP
View
Price last confirmed 15 days ago
B+
Retailer 5
-
$510 USD
View
B+
Retailer 6
-
$588 USD
View
B
Retailer 7
-
$621 USD
View
Retailer 8
-
$733 USD
SGD 990 SGD
View
Price last confirmed 20 days ago
Most Expensive
B
MOH London
LG786690205 · Nov 1
$856 USD
£674 GBP
View
8 more retailers have this diamond
Prices start from $148 USDSave up to $708 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
$148 USD