CaratHunter
Plans
Round|Lab Grown|IGI

3.50ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG669452589

Shape and cutting style on the report: Round brilliant

Certificate IGI LG669452589

Diamond specifications and retailer prices

From $413 USD
As of October 29, 2026
Save $1,478 USD (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,780 USD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 3.5ct lab-grown round diamond

This 3.5ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG669452589 or 669452589. Listed at 10 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG669452589
Dimensions9.77 × 9.74 × 5.97 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.77 mm9.74 mm3.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG669452589
Side View
Table 56.0%Crown 34.7°Girdle: MediumPavilion 40.4°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: $2,780 USD|Low: $403 USD|High: $2,820 USD|Avg: $1,388 USD|+0.4%
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
October 30, 2026
Retailer 11$413 USD
Retailer 9$462 USD
Retailer 2$686 USD
Retailer 6$810 USD
Retailer 3$921 USD
Retailer 5$1,234 USD
Retailer 10$1,436 USD
Retailer 8$1,440 USD
Retailer 4$1,590 USD
Retailer 12$1,646 USD
Retailer 7$1,891 USD
Retailer 13$2,024 USD
Rare Carat$2,780 USD

38 data points across 13 retailers

10 retailers$413 USD to $1,891 USD

A
Cheapest Retailer
-
$413 USD
A
Retailer 2
-
$462 USD
View
A
Retailer 3
-
$686 USD
£540 GBP
View
A
Retailer 4
-
$810 USD
€771 EUR
View
B+
Retailer 5
-
$1,436 USD
View
B+
Retailer 6
-
$1,440 USD
View
B+
Retailer 7
-
$1,646 USD
View
B+
Retailer 8
-
$1,891 USD
£1,489 GBP
View
Retailer 9
-
$2,024 USD
SGD 2,735 SGD
View
Price last confirmed 18 days ago
Most Expensive
Rare Carat
LGRD30-86340 · Oct 18
$2,780 USD
View
Price last confirmed 13 days ago
9 more retailers have this diamond
Prices start from $413 USDSave up to $1,478 USD

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
$413 USD