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Cushion|Lab Grown|IGI

4.21ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG804605050

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804605050

Diamond specifications and retailer prices

From $7,289 SGD
$5,702 USD
As of October 26, 2026
Save $36,916 SGD (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $44,206 SGD at With Clarity · As of October 30, 2026
View at With Clarity

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 top-tier cut grade and certified by IGI LG804605050 or 804605050. Listed at 21 retailers as of October 26, 2026, with prices from $7,289 to $44,206, a $36,916 spread on the same certified stone. With Clarity lists it at $44,206. 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

4.21
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804605050
Dimensions10.97 × 8.56 × 5.72 mm
L/W Ratio1.28
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
10.97 mm8.56 mm4.21 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804605050
Side View
Table 61.0%Crown 35.5°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 66.8%

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: Oct 26
Current: $11,195 SGD|Low: $7,038 SGD|High: $43,367 SGD|Avg: $17,004 SGD|+0.3%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
With Clarity
October 30, 2026
Retailer 15$7,289 SGD
Retailer 5$8,102 SGD
Retailer 12$8,403 SGD
Retailer 3$8,565 SGD
Retailer 4$8,700 SGD
Retailer 2$8,705 SGD
Retailer 6$8,795 SGD
Retailer 1$11,195 SGD
Retailer 13$13,752 SGD
Retailer 17$14,730 SGD
Retailer 14$17,807 SGD
Retailer 11$18,527 SGD
Retailer 16$19,465 SGD
Retailer 7$22,450 SGD
Retailer 8$23,466 SGD
Retailer 9$24,216 SGD
Retailer 18$28,265 SGD
Retailer 10$30,482 SGD
With Clarity$43,367 SGD

39 data points across 19 retailers

21 retailers$7,289 SGD to $44,206 SGD

A
Cheapest Retailer
-
$7,289 SGD
$5,702 USD
A
Retailer 2
-
$8,102 SGD
CA$8,802 CAD
View
A
Retailer 3
-
$8,403 SGD
$6,573 USD
View
Final sale: no returns
A
Retailer 4
-
$8,565 SGD
$6,700 USD
View
A
Retailer 5
-
$8,700 SGD
$6,805 USD
View
Retailer 6
-
$8,705 SGD
$6,809 USD
View
Price last confirmed 14 days ago
A
Retailer 7
-
$8,795 SGD
$6,880 USD
View
A
Retailer 8
-
$11,195 SGD
£6,895 GBP
View
B+
Retailer 9
-
$12,391 SGD
£7,632 GBP
View
B+
Retailer 10
-
$13,752 SGD
€10,245 EUR
View
B+
Retailer 11
-
$14,730 SGD
$11,522 USD
View
B+
Retailer 12
-
$17,807 SGD
£10,968 GBP
View
B+
Retailer 13
-
$18,527 SGD
ZAR 234,123 ZAR
View
B
Retailer 14
-
$19,465 SGD
$15,226 USD
View
B
Retailer 15
-
$22,450 SGD
$17,561 USD
View
B
Retailer 16
-
$23,466 SGD
$18,356 USD
View
B
Retailer 17
-
$24,216 SGD
$18,942 USD
View
B
Retailer 18
-
$25,597 SGD
$20,023 USD
View
B
Retailer 19
-
$28,265 SGD
$22,110 USD
View
B
Retailer 20
-
$30,482 SGD
$23,844 USD
View
Most Expensive
B
With Clarity
804605050 · Oct 30
$44,206 SGD
$34,579 USD
View
20 more retailers have this diamond
Prices start from $7,289 SGDSave up to $36,916 SGD

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
$7,289 SGD