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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 HK$187,166 HKD
As of November 3, 2026
Save HK$228,184 HKD (55%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$415,351 HKD at Cape Diamonds · As of November 3, 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 November 3, 2026, with prices from HK$187,166 to HK$415,351, a HK$228,184 spread on the same certified stone. Cape Diamonds lists it at HK$415,351. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: HK$415,351 HKD|Low: HK$187,166 HKD|High: HK$494,376 HKD|Avg: HK$322,808 HKD|-6.4%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 4HK$187,166 HKD
Retailer 3HK$210,351 HKD
Retailer 5HK$306,465 HKD
Retailer 7HK$320,234 HKD
Retailer 2HK$320,823 HKD
Cape DiamondsHK$415,351 HKD
Retailer 6HK$494,376 HKD

16 data points across 7 retailers

6 retailersHK$187,166 HKD to HK$415,351 HKD

B+
Cheapest Retailer
-
HK$187,166 HKD
Final sale: no returns
B+
Retailer 2
-
HK$210,351 HKD
View
B
Retailer 3
-
HK$306,465 HKD
View
B+
Retailer 4
-
HK$320,823 HKD
View
Most Expensive
B
Cape Diamonds
cert_6512136040 · Nov 3
HK$415,351 HKD
ZAR 855,216 ZAR
View
4 more retailers have this diamond
Prices start from HK$187,166 HKDSave up to HK$228,184 HKD

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
HK$187,166 HKD