Almost a nothing question but…
Just bought 4 spare blades/propellers for my mavic and they have arrived but have gold on the ends of each tip.
I’m sure it makes not difference but wanted to check?
Also like old tyres can you mix and match?
If these are DJI brand then you have bought the low noise version.
Not recommended to mix different propellor types
HTH
Cheers
Steve 
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