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Cushion|Lab Grown|IGI

4.29ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG821641156

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG821641156

Diamond specifications and retailer prices

From $8,566 NZD
$4,828 USD
As of November 1, 2026
Save $27,392 NZD (76%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $35,958 NZD at With Clarity · As of October 31, 2026
View at With Clarity

About this 4.29ct lab-grown cushion diamond

This 4.29ct 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 LG821641156 or 821641156. Listed at 11 retailers as of October 31, 2026, with prices from $8,566 to $35,958, a $27,392 spread on the same certified stone. With Clarity lists it at $35,958. 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

4.29
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821641156
Dimensions10.98 × 8.67 × 5.69 mm
L/W Ratio1.27
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
10.98 mm8.67 mm4.29 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821641156
Side View
Table 61.0%Crown 36.3°Girdle: MED-STKPavilion 36.4°Culet: NoneDepth 65.6%

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: $18,789 NZD|Low: $8,566 NZD|High: $49,198 NZD|Avg: $22,511 NZD|-25.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
With Clarity
November 1, 2026
Retailer 7$8,566 NZD
Retailer 6$11,299 NZD
Retailer 10$11,333 NZD
Retailer 4$11,768 NZD
Retailer 3$13,925 NZD
Retailer 5$14,809 NZD
Retailer 1$18,789 NZD
Retailer 8$23,580 NZD
Retailer 2$26,124 NZD
Retailer 9$32,372 NZD
With Clarity$35,958 NZD

41 data points across 11 retailers

11 retailers$8,566 NZD to $35,958 NZD

A
Cheapest Retailer
-
$8,566 NZD
$4,828 USD
A
Retailer 2
-
$11,299 NZD
$6,368 USD
View
A
Retailer 3
-
$11,333 NZD
HK$49,900 HKD
View
A
Retailer 4
-
$11,768 NZD
£5,222 GBP
View
A
Retailer 5
-
$13,925 NZD
$7,848 USD
View
A
Retailer 6
-
$14,809 NZD
€7,949 EUR
View
B+
Retailer 7
-
$18,789 NZD
£8,338 GBP
View
B+
Retailer 8
-
$23,580 NZD
$13,290 USD
View
B+
Retailer 9
-
$26,124 NZD
$14,723 USD
View
B+
Retailer 10
-
$32,372 NZD
$18,245 USD
View
Most Expensive
B
With Clarity
821641156 · Oct 31
$35,958 NZD
$20,266 USD
View
10 more retailers have this diamond
Prices start from $8,566 NZDSave up to $27,392 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
4.29ct Cushion
$8,566 NZD