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Cushion|Lab Grown|IGI

4.21ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG784642485

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

Certificate IGI LG784642485

Diamond specifications and retailer prices

From $7,228 NZD
$4,074 USD
As of November 1, 2026
Save $37,874 NZD (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $45,103 NZD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4.21ct lab-grown cushion diamond

This 4.21ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG784642485 or 784642485. Listed at 11 retailers as of October 31, 2026, with prices from $7,228 to $45,103, a $37,874 spread on the same certified stone. Do Amore Diamonds lists it at $45,103. 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

4.21
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784642485
Dimensions9.24 × 9.21 × 6.34 mm
L/W Ratio1.00
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
9.24 mm9.21 mm4.21 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784642485
Side View
Table 61.0%Crown 37.2°Girdle: STK-THKPavilion 39°Culet: NoneDepth 68.8%

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: $45,103 NZD|Low: $7,228 NZD|High: $57,789 NZD|Avg: $19,037 NZD|-22.0%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 5$7,228 NZD
Retailer 8$7,878 NZD
Retailer 7$8,245 NZD
Retailer 10$9,982 NZD
Retailer 3$11,788 NZD
Retailer 4$14,392 NZD
Retailer 9$14,478 NZD
Retailer 2$17,982 NZD
Retailer 6$23,155 NZD
Do Amore Diamonds$45,103 NZD

29 data points across 10 retailers

11 retailers$7,228 NZD to $45,103 NZD

A
Cheapest Retailer
-
$7,228 NZD
$4,074 USD
A
Retailer 2
-
$7,878 NZD
$4,440 USD
View
A
Retailer 3
-
$8,245 NZD
$4,647 USD
View
A
Retailer 4
-
$9,982 NZD
$5,626 USD
View
Final sale: no returns
A
Retailer 5
-
$11,788 NZD
$6,644 USD
View
A
Retailer 6
-
$14,392 NZD
€7,725 EUR
View
Retailer 7
-
$14,478 NZD
$8,160 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
$17,982 NZD
£7,980 GBP
View
B+
Retailer 9
-
$23,155 NZD
$13,050 USD
View
B
Retailer 10
-
$35,527 NZD
$20,023 USD
View
Most Expensive
B
Do Amore Diamonds
27-36DC3358C · Oct 31
$45,103 NZD
$25,420 USD
View
10 more retailers have this diamond
Prices start from $7,228 NZDSave up to $37,874 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
4.21ct Cushion
$7,228 NZD