Cushion|Lab Grown|IGI

4.00ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG817688700

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

Certificate IGI LG817688700

Diamond specifications and retailer prices

From €3,258 EUR
$3,640 USD
As of October 29, 2026
Save €5,344 EUR (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €8,602 EUR at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4ct lab-grown cushion diamond

This 4ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817688700 or 817688700. Listed at 7 retailers as of October 29, 2026, with prices from €3,258 to €8,602, a €5,344 spread on the same certified stone. Brilliant Earth lists it at €8,602. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.00
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817688700
Dimensions8.99 × 8.89 × 5.96 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.99 mm8.89 mm4.00 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817688700
Side View
Table 61.0%Crown 32.8°Girdle: MED-THKPavilion 36.8°CuletDepth 67.0%

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: €8,602 EUR|Low: €2,685 EUR|High: €9,345 EUR|Avg: €5,870 EUR|-8.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 3€3,258 EUR
Retailer 5€3,522 EUR
Retailer 4€3,892 EUR
Retailer 6€5,445 EUR
Retailer 7€5,449 EUR
Retailer 2€6,717 EUR
Brilliant Earth€8,602 EUR

31 data points across 7 retailers

7 retailers€3,258 EUR to €8,602 EUR

A
Cheapest Retailer
-
€3,258 EUR
$3,640 USD
A
Retailer 2
-
€3,522 EUR
$3,935 USD
View
A
Retailer 3
-
€3,892 EUR
$4,348 USD
View
A
Retailer 4
-
€5,445 EUR
View
Retailer 5
-
€5,449 EUR
A$9,365 AUD
View
Price last confirmed 8 days ago
A
Retailer 6
-
€6,717 EUR
£5,909 GBP
View
Most Expensive
B+
Brilliant Earth
20983230A · Oct 29
€8,602 EUR
$9,610 USD
View
6 more retailers have this diamond
Prices start from €3,258 EURSave up to €5,344 EUR

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
4.00ct Cushion
€3,258 EUR