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 $5,122 USD
As of October 29, 2026
Save $15,144 USD (75%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $20,266 USD at With Clarity · As of October 30, 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 29, 2026, with prices from $5,122 to $20,266, a $15,144 spread on the same certified stone. With Clarity lists it at $20,266. 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
Color
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: Oct 29
Current: $13,290 USD|Low: $5,122 USD|High: $27,728 USD|Avg: $13,193 USD|-41.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
With Clarity
October 30, 2026
Retailer 8$5,122 USD
Retailer 5$6,387 USD
Retailer 9$6,466 USD
Retailer 3$6,632 USD
Retailer 6$8,405 USD
Retailer 2$8,630 USD
Retailer 7$11,354 USD
Retailer 1$13,290 USD
Retailer 10$14,723 USD
Retailer 4$18,245 USD
With Clarity$20,266 USD

40 data points across 11 retailers

11 retailers$5,122 USD to $20,266 USD

A
Cheapest Retailer
-
$5,122 USD
A
Retailer 2
-
$6,387 USD
HK$49,900 HKD
View
A
Retailer 3
-
$6,466 USD
View
A
Retailer 4
-
$6,632 USD
£5,222 GBP
View
A
Retailer 5
-
$8,405 USD
€8,005 EUR
View
A
Retailer 6
-
$8,630 USD
View
B+
Retailer 7
-
$11,354 USD
£8,940 GBP
View
B+
Retailer 8
-
$13,290 USD
View
B+
Retailer 9
-
$14,723 USD
View
B+
Retailer 10
-
$18,245 USD
View
Most Expensive
B
With Clarity
821641156 · Oct 30
$20,266 USD
View
10 more retailers have this diamond
Prices start from $5,122 USDSave up to $15,144 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
4.29ct Cushion
$5,122 USD