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Cushion|Natural|GIA

0.51ct E IF Cushion Natural Diamond

GD • E/IF • GIA 6555370030

Certificate GIA 6555370030

Diamond specifications and retailer prices

From HK$4,794 HKD
As of November 4, 2026
Save HK$1,334 HKD (22%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: HK$6,128 HKD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6555370030. Listed at 5 retailers as of November 4, 2026, with prices from HK$4,794 to HK$6,128, a HK$1,334 spread on the same certified stone. Blue Nile lists it at HK$6,128. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
E
Colour
IF
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555370030
Dimensions4.50 × 4.41 × 2.98 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Minor Details of Polish
Top View
4.50 mm4.41 mm0.51 ctE / IF
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 6555370030
Side View
Table 64.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: HK$6,128 HKD|Low: HK$4,166 HKD|High: HK$6,551 HKD|Avg: HK$5,414 HKD|-6.5%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 5HK$4,794 HKD
Retailer 4HK$4,857 HKD
Retailer 3HK$5,390 HKD
Retailer 2HK$5,916 HKD
Blue NileHK$6,128 HKD

41 data points across 5 retailers

5 retailersHK$4,794 HKD to HK$6,128 HKD

A
Cheapest Retailer
-
HK$4,794 HKD
A
Retailer 2
-
HK$4,857 HKD
View
Final sale: no returns
A
Retailer 3
-
HK$5,390 HKD
View
B+
Retailer 4
-
HK$5,916 HKD
View
Most Expensive
A
Blue Nile
29230193 · Nov 5
HK$6,128 HKD
$781 USD
View
4 more retailers have this diamond
Prices start from HK$4,794 HKDSave up to HK$1,334 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.

A
0.51ct Cushion
HK$4,794 HKD