CaratHunter
Plans
Cushion|Lab Grown|IGI

4.28ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG754594736

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG754594736

Diamond specifications and retailer prices

From $5,111 USD
As of October 29, 2026
Save $21,848 USD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $26,959 USD at With Clarity · As of October 30, 2026
View at With Clarity

About this 4.28ct lab-grown cushion diamond

This 4.28ct 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 LG754594736 or 754594736. Listed at 14 retailers as of October 29, 2026, with prices from $5,111 to $26,959, a $21,848 spread on the same certified stone. With Clarity lists it at $26,959. 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

4.28
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594736
Dimensions10.72 × 8.90 × 5.80 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizePointed
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
10.72 mm8.90 mm4.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594736
Side View
Table 61.0%Crown 34.4°Girdle: STK-THKPavilion 37.1°Culet: NoneDepth 65.2%

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: $9,547 USD|Low: $5,111 USD|High: $33,745 USD|Avg: $13,723 USD|-27.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
With Clarity
October 30, 2026
Retailer 2$5,111 USD
Retailer 11$6,374 USD
Retailer 3$6,440 USD
Retailer 8$6,617 USD
Retailer 12$8,386 USD
Retailer 5$8,610 USD
Retailer 1$9,547 USD
Retailer 10$10,860 USD
Retailer 13$11,328 USD
Retailer 6$13,260 USD
Retailer 4$14,689 USD
Retailer 9$18,203 USD
Retailer 7$18,461 USD
With Clarity$26,959 USD

35 data points across 14 retailers

14 retailers$5,111 USD to $26,959 USD

A
Cheapest Retailer
-
$5,111 USD
A
Retailer 2
-
$6,374 USD
HK$49,800 HKD
View
A
Retailer 3
-
$6,440 USD
View
A
Retailer 4
-
$6,617 USD
£5,210 GBP
View
A
Retailer 5
-
$8,386 USD
€7,987 EUR
View
B+
Retailer 6
-
$8,610 USD
View
B+
Retailer 7
-
$9,547 USD
View
B+
Retailer 8
-
$10,860 USD
ZAR 175,446 ZAR
View
B+
Retailer 9
-
$11,328 USD
£8,920 GBP
View
B+
Retailer 10
-
$13,260 USD
View
B+
Retailer 11
-
$14,689 USD
View
B+
Retailer 12
-
$18,203 USD
View
B+
Retailer 13
-
$18,461 USD
SGD 24,947 SGD
View
Most Expensive
B
With Clarity
754594736 · Oct 30
$26,959 USD
View
13 more retailers have this diamond
Prices start from $5,111 USDSave up to $21,848 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
4.28ct Cushion
$5,111 USD