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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG770639320

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770639320

Diamond specifications and retailer prices

From $148 USD
As of October 29, 2026
Save $880 USD (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,028 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 LG770639320 or 770639320. Listed at 18 retailers as of October 28, 2026, with prices from $148 to $1,028, a $880 spread on the same certified stone. Reve Diamonds lists it at $1,028. 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 angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770639320
Dimensions6.61 × 6.63 × 4.05 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.61 mm6.63 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770639320
Side View
Table 59.0%Crown 34.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.2%

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: Oct 29
Current: $317 USD|Low: $142 USD|High: $870 USD|Avg: $381 USD|+4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 10$148 USD
Retailer 5$165 USD
Retailer 3$172 USD
Retailer 12$184 USD
Retailer 1$317 USD
Retailer 13$339 USD
Retailer 7$349 USD
Retailer 6$360 USD
Retailer 2$431 USD
Retailer 11$510 USD
Retailer 4$591 USD
Retailer 8$624 USD
Retailer 9$860 USD

41 data points across 13 retailers

18 retailers$148 USD to $1,028 USD

A
Cheapest Retailer
-
$148 USD
A
Retailer 2
-
$165 USD
View
Final sale: no returns
A
Retailer 3
-
$172 USD
View
A
Retailer 4
-
$184 USD
View
A
Retailer 5
-
$184 USD
View
A
Retailer 6
-
$309 USD
View
A
Retailer 7
-
$317 USD
£249 GBP
View
B+
Retailer 8
-
$339 USD
View
B+
Retailer 9
-
$349 USD
€332 EUR
View
A
Retailer 10
-
$360 USD
£283 GBP
View
B+
Retailer 11
-
$431 USD
View
B
Retailer 12
-
$472 USD
View
B+
Retailer 13
-
$510 USD
View
B
Retailer 14
-
$591 USD
View
B
Retailer 15
-
$624 USD
View
B
Retailer 16
-
$646 USD
View
B
Retailer 17
-
$860 USD
£677 GBP
View
Most Expensive
B
Reve Diamonds
0394E2DC1 · Oct 28
$1,028 USD
View
17 more retailers have this diamond
Prices start from $148 USDSave up to $880 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
$148 USD