CaratHunter
Plans
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 $5,800 AUD
$4,074 USD
As of October 30, 2026
Save $30,388 AUD (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $36,188 AUD 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 30, 2026, with prices from $5,800 to $36,188, a $30,388 spread on the same certified stone. Do Amore Diamonds lists it at $36,188. 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: Oct 30
Current: $36,188 AUD|Low: $5,800 AUD|High: $46,367 AUD|Avg: $15,361 AUD|-22.0%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 3$5,800 AUD
Retailer 6$6,321 AUD
Retailer 5$6,615 AUD
Retailer 10$8,009 AUD
Retailer 8$9,525 AUD
Retailer 2$11,547 AUD
Retailer 9$11,617 AUD
Retailer 7$14,505 AUD
Retailer 4$18,578 AUD
Do Amore Diamonds$36,188 AUD

28 data points across 10 retailers

11 retailers$5,800 AUD to $36,188 AUD

A
Cheapest Retailer
-
$5,800 AUD
$4,074 USD
A
Retailer 2
-
$6,321 AUD
$4,440 USD
View
A
Retailer 3
-
$6,615 AUD
$4,647 USD
View
A
Retailer 4
-
$8,009 AUD
$5,626 USD
View
Final sale: no returns
A
Retailer 5
-
$9,525 AUD
$6,691 USD
View
A
Retailer 6
-
$11,547 AUD
€7,725 EUR
View
Retailer 7
-
$11,617 AUD
$8,160 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
$14,505 AUD
£8,023 GBP
View
B+
Retailer 9
-
$18,578 AUD
$13,050 USD
View
B
Retailer 10
-
$28,505 AUD
$20,023 USD
View
Most Expensive
B
Do Amore Diamonds
27-36DC3358C · Oct 31
$36,188 AUD
$25,420 USD
View
10 more retailers have this diamond
Prices start from $5,800 AUDSave up to $30,388 AUD

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
$5,800 AUD