CaratHunter
Plans
Cushion|Lab Grown|IGI

3.80ct E SI1 Cushion Lab Grown Diamond

GD • E/SI1 • IGI LG655438364

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG655438364

Diamond specifications and retailer prices

From $529 USD
As of October 28, 2026
Save $3,651 USD (87%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $4,180 USD at Kay Jewelers · As of October 26, 2026
View at Kay Jewelers

About this 3.8ct lab-grown cushion diamond

This 3.8ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG655438364 or 655438364. Listed at 7 retailers as of October 26, 2026, with prices from $529 to $4,180, a $3,651 spread on the same certified stone. Kay Jewelers lists it at $4,180. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.80
Carat
E
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG655438364
Dimensions9.05 × 8.98 × 6.08 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
9.05 mm8.98 mm3.80 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG655438364
Side View
Table 61.0%Crown 35.1°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 67.7%

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 28
Current: $4,180 USD|Low: $365 USD|High: $4,190 USD|Avg: $2,110 USD
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 28, 2026
Retailer 9$529 USD
Retailer 4$805 USD
Retailer 6$877 USD
Retailer 2$880 USD
Retailer 11$1,051 USD
Retailer 12$1,085 USD
Retailer 8$1,910 USD
Retailer 10$2,069 USD
Retailer 5$2,583 USD
Retailer 3$3,330 USD
Retailer 7$4,010 USD
Kay Jewelers$4,180 USD

19 data points across 12 retailers

7 retailers$529 USD to $4,180 USD

A
Cheapest Retailer
-
$529 USD
Final sale: no returns
B+
Retailer 2
-
$877 USD
View
B+
Retailer 3
-
$880 USD
View
B
Retailer 4
-
$1,910 USD
View
B
Retailer 5
-
$2,583 USD
£2,034 GBP
View
B
Retailer 6
-
$4,010 USD
View
Most Expensive
C
Kay Jewelers
252769047 · Oct 26
$4,180 USD
View
6 more retailers have this diamond
Prices start from $529 USDSave up to $3,651 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
3.80ct Cushion
$529 USD