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Cushion|Lab Grown|IGI

3.05ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG693508842

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG693508842

Diamond specifications and retailer prices

From $507 USD
As of October 25, 2026
Save $3,093 USD (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,600 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.05ct lab-grown cushion diamond

This 3.05ct lab-grown cushion 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 LG693508842 or 693508842. Listed at 12 retailers as of October 25, 2026, with prices from $507 to $3,600, a $3,093 spread on the same certified stone. Brilliant Earth lists it at $3,600. 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

3.05
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG693508842
Dimensions8.43 × 8.34 × 5.53 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.43 mm8.34 mm3.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG693508842
Side View
Table 63.0%Crown 36.4°Girdle: MED-STKPavilion 39°Culet: NoneDepth 66.3%

Caratlytics Score

How it works →
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 25
Current: $3,600 USD|Low: $507 USD|High: $4,020 USD|Avg: $1,358 USD|-10.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 6$507 USD
Retailer 9$625 USD
Retailer 10$715 USD
Retailer 5$742 USD
Retailer 3$802 USD
Retailer 2$835 USD
Retailer 12$886 USD
Retailer 4$1,014 USD
Retailer 7$1,985 USD
Retailer 8$1,994 USD
Retailer 11$2,401 USD
Brilliant Earth$3,600 USD

24 data points across 12 retailers

12 retailers$507 USD to $3,600 USD

A
Cheapest Retailer
-
$507 USD
Retailer 2
-
$625 USD
£492 GBP
View
Price last confirmed 13 days ago
A
Retailer 3
-
$715 USD
View
A
Retailer 4
-
$742 USD
€707 EUR
View
B+
Retailer 5
-
$802 USD
View
A
Retailer 6
-
$835 USD
£657 GBP
View
A
Retailer 7
-
$886 USD
View
A
Retailer 8
-
$1,014 USD
View
B
Retailer 9
-
$1,985 USD
View
B
Retailer 10
-
$1,994 USD
£1,570 GBP
View
B
Retailer 11
-
$2,401 USD
View
Most Expensive
B
Brilliant Earth
13577120A · Oct 29
$3,600 USD
View
11 more retailers have this diamond
Prices start from $507 USDSave up to $3,093 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
3.05ct Cushion
$507 USD