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1.20ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG587320466

Shape and cutting style on the report: Round brilliant

Certificate IGI LG587320466

Diamond specifications and retailer prices

From $680 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: $680 USD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

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 LG587320466 or 587320466. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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 angle35.4°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG587320466
Dimensions6.80 × 6.76 × 4.22 mm
L/W Ratio1.01
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
6.80 mm6.76 mm1.20 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG587320466
Side View
Table 59.0%Crown 35.4°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $680 USD|Low: $377 USD|High: $1,710 USD|Avg: $572 USD|-5.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
February 26, 2026
Retailer 5$419 USD
Retailer 7$425 USD
Retailer 2$495 USD
Retailer 6$586 USD
Brilliant Earth$680 USD
Retailer 4$722 USD
Retailer 3$1,710 USD

31 data points across 7 retailers

1 retailer

B
Brilliant Earth
7717368Y · Oct 31
$680 USD
View

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.

B
1.20ct Round
$680 USD