Cushion|Lab Grown|GIA

6.21ct E IF Cushion Lab Grown Diamond

ID • E/IF • GIA 6512136040

Certificate GIA 6512136040

Diamond specifications and retailer prices

From $23,855 USD
As of October 29, 2026
Save $28,919 USD (55%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $52,774 USD at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 6.21ct lab-grown cushion diamond

This 6.21ct lab-grown cushion sits in the over five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6512136040. Listed at 6 retailers as of October 29, 2026, with prices from $23,855 to $52,774, a $28,919 spread on the same certified stone. Cape Diamonds lists it at $52,774. 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

6.21
Carat
E
Color
IF
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6512136040
Dimensions10.45 × 10.36 × 6.93 mm
L/W Ratio1.01
Top View
10.45 mm10.36 mm6.21 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512136040
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 66.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $52,774 USD|Low: $17,038 USD|High: $63,010 USD|Avg: $41,238 USD|-6.6%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 4$23,855 USD
Retailer 3$26,810 USD
Retailer 5$39,060 USD
Retailer 7$40,815 USD
Retailer 2$41,109 USD
Cape Diamonds$52,774 USD
Retailer 6$63,010 USD

17 data points across 7 retailers

6 retailers$23,855 USD to $52,774 USD

B+
Cheapest Retailer
-
$23,855 USD
Final sale: no returns
B+
Retailer 2
-
$26,810 USD
View
B
Retailer 3
-
$39,060 USD
£30,756 GBP
View
B+
Retailer 4
-
$41,109 USD
£32,369 GBP
View
Most Expensive
B
Cape Diamonds
cert_6512136040 · Oct 29
$52,774 USD
ZAR 852,575 ZAR
View
4 more retailers have this diamond
Prices start from $23,855 USDSave up to $28,919 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.

B+
6.21ct Cushion
$23,855 USD