CaratHunter
Plans
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 $189 SGD
$148 USD
As of October 29, 2026
Save $1,125 SGD (86%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,314 SGD 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 $189 to $1,314, a $1,125 spread on the same certified stone. Reve Diamonds lists it at $1,314. 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: $459 SGD|Low: $182 SGD|High: $1,112 SGD|Avg: $514 SGD|+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$189 SGD
Retailer 3$220 SGD
Retailer 11$235 SGD
Retailer 5$406 SGD
Retailer 12$433 SGD
Retailer 6$446 SGD
Retailer 1$459 SGD
Retailer 2$551 SGD
Retailer 10$652 SGD
Retailer 4$756 SGD
Retailer 7$798 SGD
Retailer 8$1,099 SGD

42 data points across 12 retailers

18 retailers$189 SGD to $1,314 SGD

A
Cheapest Retailer
-
$189 SGD
$148 USD
A
Retailer 2
-
$211 SGD
$165 USD
View
Final sale: no returns
A
Retailer 3
-
$220 SGD
$172 USD
View
A
Retailer 4
-
$235 SGD
$184 USD
View
A
Retailer 5
-
$235 SGD
$184 USD
View
A
Retailer 6
-
$395 SGD
$309 USD
View
A
Retailer 7
-
$406 SGD
£250 GBP
View
B+
Retailer 8
-
$433 SGD
$339 USD
View
B+
Retailer 9
-
$446 SGD
€332 EUR
View
A
Retailer 10
-
$459 SGD
£283 GBP
View
B+
Retailer 11
-
$551 SGD
$431 USD
View
B
Retailer 12
-
$603 SGD
$472 USD
View
B+
Retailer 13
-
$652 SGD
$510 USD
View
B
Retailer 14
-
$756 SGD
$591 USD
View
B
Retailer 15
-
$798 SGD
$624 USD
View
B
Retailer 16
-
$826 SGD
$646 USD
View
B
Retailer 17
-
$1,099 SGD
£677 GBP
View
Most Expensive
B
Reve Diamonds
0394E2DC1 · Oct 30
$1,314 SGD
$1,028 USD
View
17 more retailers have this diamond
Prices start from $189 SGDSave up to $1,125 SGD

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
$189 SGD