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Cushion|Lab Grown|IGI

4.31ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG830648621

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG830648621

Diamond specifications and retailer prices

From $5,837 USD
As of November 2, 2026
Save $29,563 USD (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $35,400 USD at With Clarity · As of November 3, 2026
View at With Clarity

About this 4.31ct lab-grown cushion diamond

This 4.31ct 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 LG830648621 or 830648621. Listed at 20 retailers as of November 2, 2026, with prices from $5,837 to $35,400, a $29,563 spread on the same certified stone. With Clarity lists it at $35,400. 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

4.31
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830648621
Dimensions11.83 × 8.34 × 5.55 mm
L/W Ratio1.42
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
11.83 mm8.34 mm4.31 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830648621
Side View
Table 60.0%Crown 35.3°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 66.5%

Caratlytics Score

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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: Nov 2
Current: $8,641 USD|Low: $5,636 USD|High: $34,692 USD|Avg: $12,973 USD|-2.3%
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
Retailer 14
With Clarity
November 3, 2026
Retailer 10$5,837 USD
Retailer 13$6,965 USD
Retailer 6$6,973 USD
Retailer 2$7,040 USD
Retailer 3$7,986 USD
Retailer 1$8,641 USD
Retailer 4$9,921 USD
Retailer 7$10,932 USD
Retailer 12$11,795 USD
Retailer 8$14,173 USD
Retailer 9$14,824 USD
Retailer 11$15,588 USD
Retailer 5$17,978 USD
Retailer 14$20,499 USD
With Clarity$34,692 USD

43 data points across 15 retailers

20 retailers$5,837 USD to $35,400 USD

A
Cheapest Retailer
-
$5,837 USD
A
Retailer 2
-
$6,487 USD
CA$9,010 CAD
View
A
Retailer 3
-
$6,955 USD
View
Retailer 4
-
$6,965 USD
View
Price last confirmed 17 days ago
A
Retailer 5
-
$6,973 USD
View
A
Retailer 6
-
$7,040 USD
View
A
Retailer 7
-
$7,986 USD
View
Final sale: no returns
A
Retailer 8
-
$8,641 USD
£6,804 GBP
View
B+
Retailer 9
-
$9,921 USD
£7,812 GBP
View
B+
Retailer 10
-
$10,932 USD
€10,411 EUR
View
B+
Retailer 11
-
$11,795 USD
View
B+
Retailer 12
-
$14,173 USD
£11,160 GBP
View
B+
Retailer 13
-
$14,824 USD
ZAR 239,486 ZAR
View
B
Retailer 14
-
$15,588 USD
View
Retailer 15
-
$17,978 USD
View
Price last confirmed 7 days ago
B
Retailer 16
-
$18,792 USD
View
B
Retailer 17
-
$19,378 USD
View
B
Retailer 18
-
$20,499 USD
View
B
Retailer 19
-
$24,302 USD
View
Most Expensive
B
With Clarity
830648621 · Nov 3
$35,400 USD
View
19 more retailers have this diamond
Prices start from $5,837 USDSave up to $29,563 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
4.31ct Cushion
$5,837 USD