What kind of Coelogyne is this?

[nenella]

My Mother gave me a present whilst I was visiting her..
It's a Coelogyne...? not sure what? She told me it's a 'densiflora' - I think it's more like a "Coelogyne pulverola" or "pulverula" from pictures I've seen on the web....
Here are a couple of pictures of the plant she divided, which luckily for me was in flower whilst I was over there, unfortunately the close up is blurred..
I would also be grateful for any info on it's culture.I haven't really found any 'real' info on it..she grows it outside planted in a mixture of sand & charcoal.

Any info would be very appreciated. My mum tells me it's a 'tough' & very hardy plant.