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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 $145,778 NZD
HK$640,800 HKD
As of November 1, 2026
Save $124,554 NZD (46%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $270,332 NZD at MOH London · As of November 1, 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 November 1, 2026, with prices from $145,778 to $270,332, a $124,554 spread on the same certified stone. MOH London lists it at $270,332. 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
Colour
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: Nov 1
Current: $270,332 NZD|Low: $145,778 NZD|High: $304,878 NZD|Avg: $208,211 NZD|-10.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 2$145,778 NZD
Retailer 3$160,786 NZD
Retailer 7$177,490 NZD
Retailer 4$177,629 NZD
Retailer 6$212,313 NZD
Retailer 5$213,570 NZD
MOH London$270,332 NZD

33 data points across 7 retailers

7 retailers$145,778 NZD to $270,332 NZD

A
Cheapest Retailer
-
$145,778 NZD
HK$640,800 HKD
A
Retailer 2
-
$160,786 NZD
€86,158 EUR
View
Retailer 3
-
$177,490 NZD
SGD 134,953 SGD
View
Price last confirmed 23 days ago
B+
Retailer 4
-
$177,629 NZD
$99,943 USD
View
B+
Retailer 5
-
$212,313 NZD
$119,458 USD
View
B+
Retailer 6
-
$213,570 NZD
€114,443 EUR
View
Most Expensive
B
MOH London
CC0A9A253 · Nov 1
$270,332 NZD
£119,766 GBP
View
6 more retailers have this diamond
Prices start from $145,778 NZDSave up to $124,554 NZD

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
$145,778 NZD