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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG654412899

Shape and cutting style on the report: Round brilliant

Certificate IGI LG654412899

Diamond specifications and retailer prices

From HK$1,200 HKD
$153 USD
As of October 29, 2026
Save HK$6,980 HKD (85%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: HK$54,473 HKD at Rare Carat · As of August 9, 2026
View at Rare Carat

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 LG654412899 or 654412899. Listed at 22 retailers as of October 29, 2026, with a 581% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle35.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654412899
Dimensions6.60 × 6.56 × 4.08 mm
L/W Ratio1.01
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
6.60 mm6.56 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654412899
Side View
Table 56.0%Crown 35.9°Girdle: MediumPavilion 40.5°Culet: NoneDepth 62.1%

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: HK$3,295 HKD|Low: HK$941 HKD|High: HK$8,180 HKD|Avg: HK$3,660 HKD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 7HK$1,200 HKD
Retailer 5HK$1,342 HKD
Retailer 3HK$1,483 HKD
Retailer 15HK$1,483 HKD
Retailer 9HK$2,432 HKD
Retailer 2HK$2,584 HKD
Retailer 16HK$2,715 HKD
Retailer 11HK$2,900 HKD
Rare CaratHK$3,295 HKD
Retailer 14HK$3,421 HKD
Retailer 12HK$3,764 HKD
Retailer 13HK$4,001 HKD
Retailer 4HK$4,041 HKD
Retailer 8HK$4,778 HKD
Retailer 6HK$5,209 HKD
Retailer 10HK$6,985 HKD
Retailer 17HK$8,180 HKD

44 data points across 17 retailers

22 retailersHK$1,200 HKD to HK$8,180 HKD

Retailer 1
-
HK$1,185 HKD
$151 USD
Price last confirmed 38 days ago
A
Retailer 2
-
HK$1,200 HKD
$153 USD
View
A
Retailer 3
-
HK$1,342 HKD
$171 USD
View
Final sale: no returns
Retailer 4
-
HK$1,451 HKD
$185 USD
View
Price last confirmed 38 days ago
A
Retailer 5
-
HK$1,483 HKD
$189 USD
View
A
Retailer 6
-
HK$1,483 HKD
$189 USD
View
A
Retailer 7
-
HK$2,432 HKD
$310 USD
View
A
Retailer 8
-
HK$2,584 HKD
£259 GBP
View
A
Retailer 9
-
HK$2,715 HKD
$346 USD
View
B+
Retailer 10
-
HK$2,900 HKD
€352 EUR
View
B+
Retailer 11
-
HK$3,295 HKD
$420 USD
View
B+
Retailer 12
-
HK$3,421 HKD
$436 USD
View
B+
Retailer 13
-
HK$3,764 HKD
A$738 AUD
View
Retailer 14
-
HK$4,001 HKD
$510 USD
View
Price last confirmed 14 days ago
B+
Retailer 15
-
HK$4,041 HKD
$515 USD
View
Retailer 16
-
HK$4,527 HKD
$577 USD
View
Price last confirmed 38 days ago
Retailer 17
-
HK$4,739 HKD
$604 USD
View
Price last confirmed 39 days ago
B
Retailer 18
-
HK$4,778 HKD
$609 USD
View
B
Retailer 19
-
HK$5,209 HKD
$664 USD
View
B
Retailer 20
-
HK$6,985 HKD
£701 GBP
View
B
Retailer 21
-
HK$8,180 HKD
$1,043 USD
View
Most Expensive
Rare Carat
26153 · Aug 9
HK$54,473 HKD
$6,943 USD
View
Price under review
21 more retailers have this diamond
Prices start from HK$1,200 HKDSave up to HK$6,980 HKD

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
HK$1,200 HKD