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Round|Lab Grown|IGI

3.50ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG821689512

Shape and cutting style on the report: Round brilliant

Certificate IGI LG821689512

Diamond specifications and retailer prices

From HK$3,751 HKD
$478 USD
As of October 29, 2026
Save HK$13,439 HKD (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: HK$36,643 HKD at Brilliant Earth · As of October 1, 2026
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 LG821689512 or 821689512. Listed at 18 retailers as of October 29, 2026, with a 358% 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

3.50
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle41.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821689512
Dimensions9.80 × 9.85 × 5.93 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
9.80 mm9.85 mm3.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821689512
Side View
Table 61.0%Crown 31.7°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: HK$6,236 HKD|Low: HK$3,751 HKD|High: HK$17,309 HKD|Avg: HK$9,776 HKD|+0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 9HK$3,751 HKD
Retailer 6HK$5,767 HKD
Retailer 1HK$6,236 HKD
Retailer 10HK$7,266 HKD
Retailer 3HK$7,705 HKD
Retailer 5HK$7,967 HKD
Retailer 2HK$8,670 HKD
Retailer 8HK$12,515 HKD
Retailer 7HK$15,183 HKD
Retailer 4HK$17,190 HKD

42 data points across 10 retailers

18 retailersHK$3,751 HKD to HK$17,190 HKD

Retailer 1
-
HK$3,751 HKD
$478 USD
Price last confirmed 38 days ago
A
Retailer 2
-
HK$3,751 HKD
$478 USD
View
A
Retailer 3
-
HK$4,206 HKD
$536 USD
View
Retailer 4
-
HK$4,598 HKD
$586 USD
View
Price last confirmed 38 days ago
A
Retailer 5
-
HK$4,653 HKD
$593 USD
View
Retailer 6
-
HK$4,653 HKD
$593 USD
View
Price last confirmed 14 days ago
A
Retailer 7
-
HK$5,767 HKD
$735 USD
View
A
Retailer 8
-
HK$6,236 HKD
£626 GBP
View
B+
Retailer 9
-
HK$7,266 HKD
$926 USD
View
A
Retailer 10
-
HK$7,705 HKD
£773 GBP
View
A
Retailer 11
-
HK$7,967 HKD
€967 EUR
View
A
Retailer 12
-
HK$8,670 HKD
$1,105 USD
View
B
Retailer 13
-
HK$12,515 HKD
$1,595 USD
View
B
Retailer 14
-
HK$14,963 HKD
$1,907 USD
View
Retailer 15
-
HK$14,963 HKD
$1,907 USD
View
Price last confirmed 39 days ago
B
Retailer 16
-
HK$15,183 HKD
$1,935 USD
View
B
Retailer 17
-
HK$17,190 HKD
£1,725 GBP
View
Most Expensive
Brilliant Earth
21314933A · Oct 1
HK$36,643 HKD
$4,670 USD
View
Price last confirmed 29 days ago
17 more retailers have this diamond
Prices start from HK$3,751 HKDSave up to HK$13,439 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
3.50ct Round
HK$3,751 HKD