Sure there is.  It's called Wood's Glass:
http://en.wikipedia.org/wiki/Wood%27s_glass

That's the purple glass used on blacklight tubes.

Danny

Wouter van Ooijen wrote:
>> IANAE, but isn't it possible that an object that is opaque to visible light, 
>> could be (semi-)transparent to UV?
>>     
>
> I don't see why not. The IR-passing housing of IR receivers is very dark 
> blue, almost black, to my eyes. And the black foam I use for packing ICs 
> reflects IR perfectly. (That's all IR, but why shouldn't that be the 
> case for UV).
>
>   

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