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Cushion|Lab Grown|IGI

4.21ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG628448091

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG628448091

Diamond specifications and retailer prices

From $5,052 SGD
$3,952 USD
As of October 30, 2026
Save $26,396 SGD (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $31,449 SGD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG628448091 or 628448091. Listed at 12 retailers as of October 30, 2026, with prices from $5,052 to $31,449, a $26,396 spread on the same certified stone. Do Amore Diamonds lists it at $31,449. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628448091
Dimensions9.23 × 9.07 × 6.15 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
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
9.23 mm9.07 mm4.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628448091
Side View
Table 58.0%Crown 37.5°Girdle: THK-VTKPavilion 37.6°Culet: NoneDepth 67.8%

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 30
Current: $31,449 SGD|Low: $5,052 SGD|High: $41,637 SGD|Avg: $15,020 SGD|-24.5%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 5$5,052 SGD
Retailer 8$5,293 SGD
Retailer 7$5,901 SGD
Retailer 3$7,192 SGD
Retailer 11$8,554 SGD
Retailer 2$10,010 SGD
Retailer 12$10,432 SGD
Retailer 9$12,605 SGD
Retailer 10$14,542 SGD
Retailer 6$16,683 SGD
Retailer 4$25,597 SGD
Do Amore Diamonds$31,449 SGD

30 data points across 12 retailers

12 retailers$5,052 SGD to $31,449 SGD

A
Cheapest Retailer
-
$5,052 SGD
$3,952 USD
A
Retailer 2
-
$5,293 SGD
$4,140 USD
View
A
Retailer 3
-
$5,901 SGD
$4,616 USD
View
A
Retailer 4
-
$7,192 SGD
$5,626 USD
View
Final sale: no returns
A
Retailer 5
-
$8,554 SGD
$6,691 USD
View
A
Retailer 6
-
$10,010 SGD
€7,457 EUR
View
Retailer 7
-
$10,432 SGD
$8,160 USD
View
Price last confirmed 12 days ago
B+
Retailer 8
-
$12,605 SGD
£7,764 GBP
View
B+
Retailer 9
-
$14,542 SGD
$11,375 USD
View
B+
Retailer 10
-
$16,683 SGD
$13,050 USD
View
B
Retailer 11
-
$25,597 SGD
$20,023 USD
View
Most Expensive
B
Do Amore Diamonds
27-AD300EFA9 · Oct 31
$31,449 SGD
$24,600 USD
View
11 more retailers have this diamond
Prices start from $5,052 SGDSave up to $26,396 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
$5,052 SGD