Cushion|Natural|GIA

5.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 6551670294

Certificate GIA 6551670294

Diamond specifications and retailer prices

From €73,417 EUR
HK$640,800 HKD
As of November 1, 2026
Save €62,728 EUR (46%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €136,146 EUR 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 €73,417 to €136,146, a €62,728 spread on the same certified stone. MOH London lists it at €136,146. 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: Nov 1
Current: €136,146 EUR|Low: €73,417 EUR|High: €153,544 EUR|Avg: €104,860 EUR|-10.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 2€73,417 EUR
Retailer 3€80,976 EUR
Retailer 7€89,388 EUR
Retailer 4€89,458 EUR
Retailer 6€106,926 EUR
Retailer 5€107,559 EUR
MOH London€136,146 EUR

33 data points across 7 retailers

7 retailers€73,417 EUR to €136,146 EUR

A
Cheapest Retailer
-
€73,417 EUR
HK$640,800 HKD
A
Retailer 2
-
€80,976 EUR
View
Retailer 3
-
€89,388 EUR
SGD 134,953 SGD
View
Price last confirmed 23 days ago
B+
Retailer 4
-
€89,458 EUR
$99,943 USD
View
B+
Retailer 5
-
€106,926 EUR
$119,458 USD
View
B+
Retailer 6
-
€107,559 EUR
View
Most Expensive
B
MOH London
CC0A9A253 · Nov 1
€136,146 EUR
£119,766 GBP
View
6 more retailers have this diamond
Prices start from €73,417 EURSave up to €62,728 EUR

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
€73,417 EUR