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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 $613 SGD
$478 USD
As of October 29, 2026
Save $2,195 SGD (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $5,986 SGD 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: $1,019 SGD|Low: $613 SGD|High: $2,827 SGD|Avg: $1,597 SGD|+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 9$613 SGD
Retailer 6$942 SGD
Retailer 1$1,019 SGD
Retailer 10$1,187 SGD
Retailer 3$1,259 SGD
Retailer 5$1,301 SGD
Retailer 2$1,416 SGD
Retailer 8$2,044 SGD
Retailer 7$2,480 SGD
Retailer 4$2,808 SGD

42 data points across 10 retailers

18 retailers$613 SGD to $2,808 SGD

Retailer 1
-
$613 SGD
$478 USD
Price last confirmed 38 days ago
A
Retailer 2
-
$613 SGD
$478 USD
View
A
Retailer 3
-
$687 SGD
$536 USD
View
Retailer 4
-
$751 SGD
$586 USD
View
Price last confirmed 38 days ago
A
Retailer 5
-
$760 SGD
$593 USD
View
Retailer 6
-
$760 SGD
$593 USD
View
Price last confirmed 14 days ago
A
Retailer 7
-
$942 SGD
$735 USD
View
A
Retailer 8
-
$1,019 SGD
£626 GBP
View
B+
Retailer 9
-
$1,187 SGD
$926 USD
View
A
Retailer 10
-
$1,259 SGD
£773 GBP
View
A
Retailer 11
-
$1,301 SGD
€967 EUR
View
A
Retailer 12
-
$1,416 SGD
$1,105 USD
View
B
Retailer 13
-
$2,044 SGD
$1,595 USD
View
B
Retailer 14
-
$2,444 SGD
$1,907 USD
View
Retailer 15
-
$2,444 SGD
$1,907 USD
View
Price last confirmed 39 days ago
B
Retailer 16
-
$2,480 SGD
$1,935 USD
View
B
Retailer 17
-
$2,808 SGD
£1,725 GBP
View
Most Expensive
Brilliant Earth
21314933A · Oct 1
$5,986 SGD
$4,670 USD
View
Price last confirmed 28 days ago
17 more retailers have this diamond
Prices start from $613 SGDSave up to $2,195 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
3.50ct Round
$613 SGD