Cushion|Lab Grown|IGI

4.20ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846664245

Certificate IGI LG846664245

Diamond specifications and retailer prices

From $6,293 USD
As of October 30, 2026
Save $22,017 USD (78%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $28,310 USD at With Clarity · As of October 28, 2026
View at With Clarity

About this 4.2ct lab-grown cushion diamond

This 4.2ct 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 LG846664245 or 846664245. Listed at 4 retailers as of October 28, 2026, with prices from $6,293 to $28,310, a $22,017 spread on the same certified stone. With Clarity lists it at $28,310. 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

4.20
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG846664245
Dimensions11.14 × 8.37 × 5.66 mm
L/W Ratio1.33
Top View
11.14 mm8.37 mm4.20 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846664245
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.6%

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: $6,293 USD|Low: $6,293 USD|High: $29,111 USD|Avg: $15,727 USD|-0.7%
Retailer 1
Retailer 2
Retailer 3
With Clarity
October 30, 2026
Retailer 1$6,293 USD
Retailer 3$9,420 USD
Retailer 2$10,193 USD
With Clarity$28,310 USD

5 data points across 4 retailers

4 retailers$6,293 USD to $28,310 USD

A
Cheapest Retailer
-
$6,293 USD
B+
Retailer 2
-
$9,420 USD
€8,971 EUR
View
B+
Retailer 3
-
$10,193 USD
£8,026 GBP
View
Most Expensive
B
With Clarity
846664245 · Oct 28
$28,310 USD
View
3 more retailers have this diamond
Prices start from $6,293 USDSave up to $22,017 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
4.20ct Cushion
$6,293 USD