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Cushion|Natural|GIA

3.51ct E SI1 Cushion Natural Diamond

VG • E/SI1 • GIA 6485456365

Certificate GIA 6485456365

Diamond specifications and retailer prices

From HK$419,834 HKD
As of November 7, 2026
Save HK$86,086 HKD (17%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: HK$505,920 HKD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 3.51ct natural cushion diamond

This 3.51ct natural cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6485456365. Listed at 3 retailers as of November 7, 2026, with prices from HK$419,834 to HK$505,920, a HK$86,086 spread on the same certified stone. 77 Diamonds lists it at HK$505,920. 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

3.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceMedium
Crown angle42.13°
Pavilion angle35.42°
OriginNatural
Grading LabGIA
CertificateGIA 6485456365
Dimensions9.88 × 7.85 × 5.48 mm
L/W Ratio1.26
Top View
9.88 mm7.85 mm3.51 ctE / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6485456365
Side View
Table 64.0%Crown 42.13°Girdle: STK-ETKPavilion 35.42°Culet: NoneDepth 69.8%

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 7
Current: HK$505,920 HKD|Low: HK$419,834 HKD|High: HK$516,141 HKD|Avg: HK$468,878 HKD|-0.8%
77 Diamonds
Retailer 2
November 7, 2026
Retailer 2HK$419,834 HKD
77 DiamondsHK$505,920 HKD

46 data points across 2 retailers

3 retailersHK$419,834 HKD to HK$505,920 HKD

B+
Cheapest Retailer
-
HK$419,834 HKD
B
Retailer 2
-
HK$438,785 HKD
View
Most Expensive
B
77 Diamonds
CUSMBUPC28BNB · Nov 7
HK$505,920 HKD
£50,828 GBP
View
2 more retailers have this diamond
Prices start from HK$419,834 HKDSave up to HK$86,086 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+
3.51ct Cushion
HK$419,834 HKD