Round|Lab Grown|IGI

3.50ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG818686987

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686987

Diamond specifications and retailer prices

From HK$35,544 HKD
$4,530 USD
As of October 25, 2026
13 retailers carry this diamond
Most expensive: HK$35,544 HKD at Brilliant Earth
View at Brilliant Earth

About this 3.5ct lab-grown round diamond

This 3.5ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686987 or 818686987. Listed at 13 retailers as of October 25, 2026. 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

3.50
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686987
Dimensions9.77 × 9.86 × 5.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.77 mm9.86 mm3.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686987
Side View
Table 62.0%Crown 33.4°Girdle: MediumPavilion 41.5°Culet: NoneDepth 60.2%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 25
Current: HK$35,544 HKD|Low: HK$3,994 HKD|High: HK$35,544 HKD|Avg: HK$10,685 HKD|+8.6%
Brilliant Earth
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
Retailer 18
Retailer 19
October 25, 2026
Retailer 14HK$4,159 HKD
Retailer 5HK$4,645 HKD
Retailer 18HK$4,653 HKD
Retailer 4HK$5,155 HKD
Retailer 7HK$5,155 HKD
Retailer 13HK$5,963 HKD
Retailer 17HK$6,951 HKD
Retailer 10HK$7,493 HKD
Retailer 12HK$7,782 HKD
Retailer 15HK$7,852 HKD
Retailer 3HK$7,980 HKD
Retailer 19HK$8,804 HKD
Retailer 2HK$13,307 HKD
Retailer 9HK$13,559 HKD
Retailer 6HK$15,654 HKD
Retailer 11HK$16,752 HKD
Retailer 8HK$17,626 HKD
Retailer 16HK$21,724 HKD
Brilliant EarthHK$35,544 HKD

16 data points across 19 retailers

13 retailers

Retailer 1
-
HK$4,159 HKD
$530 USD
Price last confirmed 19 days ago
Retailer 2
-
HK$4,653 HKD
$593 USD
View
Price last confirmed 17 days ago
Retailer 3
-
HK$5,155 HKD
$657 USD
View
Price last confirmed 25 days ago
Retailer 4
-
HK$5,155 HKD
$657 USD
View
Price last confirmed 19 days ago
Retailer 5
-
HK$6,951 HKD
£698 GBP
View
Price last confirmed 23 days ago
Retailer 6
-
HK$7,980 HKD
$1,017 USD
View
Price last confirmed 16 days ago
Retailer 7
-
HK$13,307 HKD
$1,696 USD
View
Price last confirmed 14 days ago
Retailer 8
-
HK$13,559 HKD
$1,728 USD
View
Price last confirmed 22 days ago
Retailer 9
-
HK$15,654 HKD
$1,995 USD
View
Price last confirmed 22 days ago
Retailer 10
-
HK$16,752 HKD
$2,135 USD
View
Price last confirmed 14 days ago
Retailer 11
-
HK$17,626 HKD
$2,246 USD
View
Price last confirmed 16 days ago
Retailer 12
-
HK$21,724 HKD
£2,180 GBP
View
Price last confirmed 22 days ago
Most Expensive
C
Brilliant Earth
21805039A · Oct 25
HK$35,544 HKD
$4,530 USD
View
12 more retailers have this diamond

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.

C
3.50ct Round
HK$35,544 HKD