CaratHunter
Plans
Cushion|Lab Grown|IGI

3.58ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG640436635

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG640436635

Diamond specifications and retailer prices

From $3,900 USD
As of October 30, 2026
1 retailer carries this diamond
Only listing: $3,900 USD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 3.58ct lab-grown cushion diamond

This 3.58ct lab-grown cushion 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 LG640436635 or 640436635. Listed at a single retailer as of October 30, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

3.58
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640436635
Dimensions9.92 × 8.46 × 5.62 mm
L/W Ratio1.17
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.92 mm8.46 mm3.58 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640436635
Side View
Table 64.0%Crown 34.1°Girdle: MED-THKPavilion 38.4°Culet: NoneDepth 66.4%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,900 USD|Low: $3,900 USD|High: $5,570 USD|Avg: $4,735 USD|-30.0%
October 30, 2026
Brilliant Earth$3,900 USD

2 data points across 1 retailer

1 retailer

B
Brilliant Earth
15535353B · Oct 30
$3,900 USD
View

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.

B
3.58ct Cushion
$3,900 USD