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Cushion|Natural|GIA

0.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6521626623

Certificate GIA 6521626623

Diamond specifications and retailer prices

From HK$3,205 HKD
As of November 6, 2026
Save HK$6,091 HKD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$9,297 HKD at MOH London · As of November 7, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6521626623. Listed at 13 retailers as of November 6, 2026, with prices from HK$3,205 to HK$9,297, a HK$6,091 spread on the same certified stone. MOH London lists it at HK$9,297. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6521626623
Dimensions5.01 × 4.55 × 2.99 mm
L/W Ratio1.10
Top View
5.01 mm4.55 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6521626623
Side View
Table 64.0%CrownGirdle: MED-MEDPavilionCulet: NoneDepth 65.7%

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 6
Current: HK$9,297 HKD|Low: HK$2,516 HKD|High: HK$9,416 HKD|Avg: HK$5,336 HKD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 13HK$3,205 HKD
Retailer 11HK$3,731 HKD
Retailer 7HK$4,209 HKD
Retailer 9HK$4,671 HKD
Retailer 2HK$5,016 HKD
Retailer 12HK$5,039 HKD
Retailer 10HK$5,173 HKD
Retailer 4HK$5,604 HKD
Retailer 3HK$5,666 HKD
Retailer 6HK$6,019 HKD
Retailer 5HK$6,050 HKD
Retailer 8HK$6,270 HKD
MOH LondonHK$9,297 HKD

45 data points across 13 retailers

13 retailersHK$3,205 HKD to HK$9,297 HKD

A
Cheapest Retailer
-
HK$3,205 HKD
A
Retailer 2
-
HK$3,731 HKD
View
Final sale: no returns
B+
Retailer 3
-
HK$4,209 HKD
View
B+
Retailer 4
-
HK$4,671 HKD
View
B+
Retailer 5
-
HK$5,016 HKD
View
B+
Retailer 6
-
HK$5,039 HKD
View
B+
Retailer 7
-
HK$5,173 HKD
View
B
Retailer 8
-
HK$5,604 HKD
View
B
Retailer 9
-
HK$5,666 HKD
View
B+
Retailer 10
-
HK$6,019 HKD
View
Retailer 11
-
HK$6,050 HKD
View
Price last confirmed 35 days ago
B+
Retailer 12
-
HK$6,270 HKD
View
Most Expensive
B
MOH London
73DB74BBB · Nov 7
HK$9,297 HKD
£934 GBP
View
12 more retailers have this diamond
Prices start from HK$3,205 HKDSave up to HK$6,091 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$3,205 HKD