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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 $211 AUD
$148 USD
As of October 29, 2026
Save $1,253 AUD (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,464 AUD at Reve Diamonds · As of October 30, 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 29, 2026, with prices from $211 to $1,464, a $1,253 spread on the same certified stone. Reve Diamonds lists it at $1,464. 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
Colour
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: $511 AUD|Low: $202 AUD|High: $1,238 AUD|Avg: $573 AUD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9$211 AUD
Retailer 3$245 AUD
Retailer 11$262 AUD
Retailer 5$452 AUD
Retailer 12$483 AUD
Retailer 6$496 AUD
Retailer 1$511 AUD
Retailer 2$614 AUD
Retailer 10$726 AUD
Retailer 4$841 AUD
Retailer 7$888 AUD
Retailer 8$1,224 AUD

42 data points across 12 retailers

18 retailers$211 AUD to $1,464 AUD

A
Cheapest Retailer
-
$211 AUD
$148 USD
A
Retailer 2
-
$235 AUD
$165 USD
View
Final sale: no returns
A
Retailer 3
-
$245 AUD
$172 USD
View
A
Retailer 4
-
$262 AUD
$184 USD
View
A
Retailer 5
-
$262 AUD
$184 USD
View
A
Retailer 6
-
$440 AUD
$309 USD
View
A
Retailer 7
-
$452 AUD
£250 GBP
View
B+
Retailer 8
-
$483 AUD
$339 USD
View
B+
Retailer 9
-
$496 AUD
€332 EUR
View
A
Retailer 10
-
$511 AUD
£283 GBP
View
B+
Retailer 11
-
$614 AUD
$431 USD
View
B
Retailer 12
-
$672 AUD
$472 USD
View
B+
Retailer 13
-
$726 AUD
$510 USD
View
B
Retailer 14
-
$841 AUD
$591 USD
View
B
Retailer 15
-
$888 AUD
$624 USD
View
B
Retailer 16
-
$920 AUD
$646 USD
View
B
Retailer 17
-
$1,224 AUD
£677 GBP
View
Most Expensive
B
Reve Diamonds
0394E2DC1 · Oct 30
$1,464 AUD
$1,028 USD
View
17 more retailers have this diamond
Prices start from $211 AUDSave up to $1,253 AUD

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
$211 AUD