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Cushion|Lab Grown|IGI

4.23ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG826639385

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG826639385

Diamond specifications and retailer prices

From $5,729 USD
As of October 26, 2026
Save $29,014 USD (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $34,743 USD at With Clarity · As of October 28, 2026
View at With Clarity

About this 4.23ct lab-grown cushion diamond

This 4.23ct 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 LG826639385 or 826639385. Listed at 20 retailers as of October 26, 2026, with prices from $5,729 to $34,743, a $29,014 spread on the same certified stone. With Clarity lists it at $34,743. 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

4.23
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG826639385
Dimensions10.83 × 8.60 × 5.67 mm
L/W Ratio1.26
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
10.83 mm8.60 mm4.23 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826639385
Side View
Table 62.0%Crown 35°Girdle: STK-THKPavilion 38.7°Culet: NoneDepth 65.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: $14,559 USD|Low: $5,131 USD|High: $22,220 USD|Avg: $11,400 USD|+1.9%
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
October 29, 2026
Retailer 10$5,729 USD
Retailer 6$6,604 USD
Retailer 5$6,754 USD
Retailer 2$6,840 USD
Retailer 7$8,539 USD
Retailer 3$9,738 USD
Retailer 8$10,807 USD
Retailer 12$11,578 USD
Retailer 9$13,993 USD
Retailer 1$14,559 USD
Retailer 11$15,298 USD
Retailer 4$17,644 USD
Retailer 13$22,220 USD

41 data points across 13 retailers

20 retailers$5,729 USD to $34,743 USD

A
Cheapest Retailer
-
$5,729 USD
A
Retailer 2
-
$6,368 USD
CA$8,844 CAD
View
A
Retailer 3
-
$6,604 USD
View
Final sale: no returns
A
Retailer 4
-
$6,754 USD
View
A
Retailer 5
-
$6,835 USD
View
Retailer 6
-
$6,840 USD
View
Price last confirmed 13 days ago
A
Retailer 7
-
$8,539 USD
£6,723 GBP
View
B+
Retailer 8
-
$9,738 USD
£7,668 GBP
View
B+
Retailer 9
-
$10,807 USD
€10,292 EUR
View
B+
Retailer 10
-
$11,578 USD
View
B+
Retailer 11
-
$13,993 USD
£11,018 GBP
View
B+
Retailer 12
-
$14,559 USD
ZAR 235,196 ZAR
View
B
Retailer 13
-
$15,298 USD
View
B
Retailer 14
-
$17,644 USD
View
B
Retailer 15
-
$18,443 USD
View
B
Retailer 16
-
$19,029 USD
View
B
Retailer 17
-
$20,119 USD
View
B
Retailer 18
-
$22,220 USD
View
B
Retailer 19
-
$23,935 USD
View
Most Expensive
B
With Clarity
826639385 · Oct 28
$34,743 USD
View
19 more retailers have this diamond
Prices start from $5,729 USDSave up to $29,014 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
4.23ct Cushion
$5,729 USD