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Cushion|Natural|GIA

5.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 6551670294

Certificate GIA 6551670294

Diamond specifications and retailer prices

From $115,775 CAD
HK$647,500 HKD
As of October 30, 2026
Save $100,056 CAD (46%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $215,831 CAD at MOH London · As of October 29, 2026
View at MOH London

About this 5.51ct natural cushion diamond

This 5.51ct natural cushion sits in the over five carat band, graded G 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 6551670294. Listed at 7 retailers as of October 29, 2026, with prices from $115,775 to $215,831, a $100,056 spread on the same certified stone. MOH London lists it at $215,831. 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

5.51
Carat
G
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551670294
Dimensions11.84 × 9.13 × 6.35 mm
L/W Ratio1.30
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
11.84 mm9.13 mm5.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551670294
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.5%

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: Oct 30
Current: $215,831 CAD|Low: $115,775 CAD|High: $239,624 CAD|Avg: $164,246 CAD|-9.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 5$115,775 CAD
Retailer 2$128,197 CAD
Retailer 7$139,502 CAD
Retailer 6$142,517 CAD
Retailer 4$166,871 CAD
Retailer 3$169,993 CAD
MOH London$215,831 CAD

32 data points across 7 retailers

7 retailers$115,775 CAD to $215,831 CAD

A
Cheapest Retailer
-
$115,775 CAD
HK$647,500 HKD
A
Retailer 2
-
$128,197 CAD
€87,402 EUR
View
Retailer 3
-
$139,502 CAD
SGD 134,953 SGD
View
Price last confirmed 22 days ago
B+
Retailer 4
-
$142,517 CAD
$102,024 USD
View
B+
Retailer 5
-
$166,871 CAD
$119,458 USD
View
B+
Retailer 6
-
$169,993 CAD
€115,898 EUR
View
Most Expensive
B
MOH London
CC0A9A253 · Oct 29
$215,831 CAD
£121,659 GBP
View
6 more retailers have this diamond
Prices start from $115,775 CADSave up to $100,056 CAD

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
5.51ct Cushion
$115,775 CAD