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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 $8,547 NZD
$4,817 USD
As of November 1, 2026
Save $39,287 NZD (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $47,833 NZD at With Clarity · As of October 31, 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 31, 2026, with prices from $8,547 to $47,833, a $39,287 spread on the same certified stone. With Clarity lists it at $47,833. 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
Colour
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: Nov 1
Current: $13,893 NZD|Low: $8,547 NZD|High: $59,874 NZD|Avg: $23,387 NZD|-0.1%
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
November 1, 2026
Retailer 9$8,547 NZD
Retailer 8$11,251 NZD
Retailer 3$11,310 NZD
Retailer 6$11,740 NZD
Retailer 1$13,893 NZD
Retailer 7$14,774 NZD
Retailer 10$16,939 NZD
Retailer 2$19,269 NZD
Retailer 4$20,100 NZD
Retailer 11$23,527 NZD
Retailer 5$26,063 NZD
Retailer 13$32,297 NZD
Retailer 12$32,755 NZD
With Clarity$47,833 NZD

36 data points across 14 retailers

14 retailers$8,547 NZD to $47,833 NZD

A
Cheapest Retailer
-
$8,547 NZD
$4,817 USD
A
Retailer 2
-
$11,251 NZD
$6,341 USD
View
A
Retailer 3
-
$11,310 NZD
HK$49,800 HKD
View
A
Retailer 4
-
$11,740 NZD
£5,210 GBP
View
A
Retailer 5
-
$13,893 NZD
$7,830 USD
View
A
Retailer 6
-
$14,774 NZD
€7,930 EUR
View
B+
Retailer 7
-
$16,939 NZD
$9,547 USD
View
B+
Retailer 8
-
$19,269 NZD
ZAR 175,446 ZAR
View
B+
Retailer 9
-
$20,100 NZD
£8,920 GBP
View
B+
Retailer 10
-
$23,527 NZD
$13,260 USD
View
B+
Retailer 11
-
$26,063 NZD
$14,689 USD
View
B+
Retailer 12
-
$32,297 NZD
$18,203 USD
View
B+
Retailer 13
-
$32,755 NZD
SGD 24,947 SGD
View
Most Expensive
B
With Clarity
754594736 · Oct 31
$47,833 NZD
$26,959 USD
View
13 more retailers have this diamond
Prices start from $8,547 NZDSave up to $39,287 NZD

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
$8,547 NZD