1895 Proof Coins With No Shine

Yes. But at that point I believe they are considered "impaired". Still a proof though, and dependent on the overall eye appeal may not reduce the market value as much as you'd think. A photo of the one in question would prove highly useful in a more accurate answer.

to the CCF

As noted, always supply good photos of both sides of the coin when making inquiries.
This helps us help you.

and:

Mirror field proof coins will loose their shine if they develop a heavy patina.
From my strictly personal point of view, I consider this to be a critical problem, especially with well struck DMPL coins (which also includes Morgans)

I feel reasonably certain, that in most cases, a bright white white DMPL Morgan in MS-65, would command a higher auction price than an equivalent DMPL Morgan in MS-65 that has a heavy patina.

That is why I always prefer modern silver proof coins in fresh, shiny, bright white, and the more valuable examples should be kept in an air-tight capsule to stop a patina from forming.
Bright white is the appearance they originally had, when they first left the coining press.

Something else that has not been mentioned yet is only the 1895 Morgan dollar was issued proof only. All other denominations were business and proof strikes.