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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG803603992

Shape and cutting style on the report: Round brilliant

Certificate IGI LG803603992

Diamond specifications and retailer prices

From $149 USD
As of October 29, 2026
Save $882 USD (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,031 USD at Reve Diamonds · As of October 28, 2026
View at Reve Diamonds

About this 1.09ct lab-grown round diamond

This 1.09ct 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 LG803603992 or 803603992. Listed at 17 retailers as of October 28, 2026, with prices from $149 to $1,031, a $882 spread on the same certified stone. Reve Diamonds lists it at $1,031. 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

1.09
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803603992
Dimensions6.65 × 6.62 × 4.05 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
6.65 mm6.62 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG803603992
Side View
Table 57.0%Crown 34.3°Girdle: MED-STKPavilion 40.6°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 29
Current: $662 USD|Low: $167 USD|High: $875 USD|Avg: $413 USD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 4$183 USD
Retailer 3$320 USD
Retailer 7$320 USD
Retailer 2$339 USD
Retailer 5$362 USD
Retailer 8$460 USD
Retailer 10$484 USD
Retailer 9$510 USD
Retailer 1$662 USD
Retailer 6$869 USD

36 data points across 10 retailers

17 retailers$149 USD to $1,031 USD

A
Cheapest Retailer
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$149 USD
A
Retailer 2
-
$173 USD
View
A
Retailer 3
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$183 USD
View
Final sale: no returns
A
Retailer 4
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$185 USD
View
A
Retailer 5
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$185 USD
View
A
Retailer 6
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$309 USD
View
A
Retailer 7
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$320 USD
£252 GBP
View
A
Retailer 8
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$320 USD
€305 EUR
View
A
Retailer 9
-
$339 USD
View
A
Retailer 10
-
$362 USD
£285 GBP
View
B+
Retailer 11
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$460 USD
A$708 AUD
View
B+
Retailer 12
-
$484 USD
View
B+
Retailer 13
-
$510 USD
View
Price last confirmed 13 days ago
B
Retailer 14
-
$594 USD
View
B
Retailer 15
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$662 USD
View
B
Retailer 16
-
$869 USD
£684 GBP
View
Most Expensive
B
Reve Diamonds
FDA9E6D5D · Oct 28
$1,031 USD
View
16 more retailers have this diamond
Prices start from $149 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
1.09ct Round
$149 USD