One of the popular suppliers has the following descriptions of metal platings on its website:
Titanium Gold - "most durable plating".
Black Titanium - "unbelievably hard and durable".
Chrome - "extremely durable".
Rhodium and Platinum - "very durable hard".
Upgrade Gold - the rack method "enhances the durability".
10K Gold - "more resistant to wear than 24K, but ultimately it will abrade with use".
24K Gold - "naturally soft and wears quickly".
Rose Gold, Satin, Black Chrome, Sterling, Copper, Antique Brass/Pewter/Copper, seem to be in a "soft by nature" category, but no real descriptions.
Gunmetal - unfortunately the plating hardness is not described, with emphasis on the variations in color depending on the manufacturer.
I will take the above as plating hardness gospel unless the IAP community disabuses me of that position.
Titanium Gold - "most durable plating".
Black Titanium - "unbelievably hard and durable".
Chrome - "extremely durable".
Rhodium and Platinum - "very durable hard".
Upgrade Gold - the rack method "enhances the durability".
10K Gold - "more resistant to wear than 24K, but ultimately it will abrade with use".
24K Gold - "naturally soft and wears quickly".
Rose Gold, Satin, Black Chrome, Sterling, Copper, Antique Brass/Pewter/Copper, seem to be in a "soft by nature" category, but no real descriptions.
Gunmetal - unfortunately the plating hardness is not described, with emphasis on the variations in color depending on the manufacturer.
I will take the above as plating hardness gospel unless the IAP community disabuses me of that position.