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Cushion|Lab Grown|IGI

4.18ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG811627555

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG811627555

Diamond specifications and retailer prices

From $4,811 USD
As of October 29, 2026
Save $13,380 USD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $18,191 USD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.18ct lab-grown cushion diamond

This 4.18ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811627555 or 811627555. Listed at 13 retailers as of October 29, 2026, with prices from $4,811 to $18,191, a $13,380 spread on the same certified stone. Taylor and Hart lists it at $18,191. 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

4.18
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.3°
Pavilion angle29.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811627555
Dimensions11.02 × 8.26 × 5.29 mm
L/W Ratio1.33
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
11.02 mm8.26 mm4.18 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811627555
Side View
Table 63.0%Crown 31.3°Girdle: STK-VTKPavilion 29.1°Culet: NoneDepth 64.0%

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 29
Current: $6,612 USD|Low: $4,150 USD|High: $21,521 USD|Avg: $9,448 USD|-15.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Taylor and Hart
October 30, 2026
Retailer 12$4,811 USD
Retailer 2$4,924 USD
Retailer 4$5,100 USD
Retailer 7$5,140 USD
Retailer 8$6,118 USD
Retailer 1$6,612 USD
Retailer 3$7,178 USD
Retailer 9$7,891 USD
Retailer 11$9,541 USD
Retailer 6$10,616 USD
Retailer 5$10,853 USD
Retailer 10$14,170 USD
Taylor and Hart$18,191 USD

43 data points across 13 retailers

13 retailers$4,811 USD to $18,191 USD

A
Cheapest Retailer
-
$4,811 USD
A
Retailer 2
-
$4,924 USD
View
Final sale: no returns
Retailer 3
-
$5,100 USD
View
Price last confirmed 14 days ago
A
Retailer 4
-
$5,140 USD
View
A
Retailer 5
-
$6,118 USD
View
A
Retailer 6
-
$6,612 USD
£5,207 GBP
View
A
Retailer 7
-
$7,178 USD
£5,652 GBP
View
A
Retailer 8
-
$7,891 USD
View
B+
Retailer 9
-
$9,541 USD
View
B+
Retailer 10
-
$10,616 USD
£8,359 GBP
View
B+
Retailer 11
-
$10,853 USD
ZAR 175,337 ZAR
View
B+
Retailer 12
-
$14,170 USD
View
Most Expensive
B
Taylor and Hart
5RC8QBX · Oct 30
$18,191 USD
View
12 more retailers have this diamond
Prices start from $4,811 USDSave up to $13,380 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
4.18ct Cushion
$4,811 USD