Rocky Horrors

[Janbuck]

I just have a few left of these - can anyone help please? Answers are minerals, rocks, stones etc. or have those words in the answer.
36 The odd armrest they'd sat in was supposed to prevent drunkenness (8)
46 Quite sour soup for December (9)
50 I leave the field Pars play on in pink and white (8)
Could someone confirm my answer for no 53 - is it Bentonite?
Thanks in advance

[Lie-in King]

36 Amethyst ('odd' letters from 'armrest theyd sat')

[Lie-in King]

46 Turquoise -anag - (soup) - Dec's birthstone)

[JMR27]

50 feldspar - field - i + anag pars

[Janbuck]

Thanks to you both and Ive just worked out no 53 as Marlstone. I think my brain was ill like my poor nose with this horrible head cold I've had this past few days.

[Diane1954]

do you have 41 dogfish rocks need sweepers to get in the house(7,6) 44 said to be a braver mother to hold back the flow across the pond (7,3) 54 Campbell's drover imitation (10,6)
Thanks

[sarumite]

Hi Diane ....
41 Curling Stones
44 Boulder Dam
54 Rhinestone Cowboy