I will horribly disappointed if Camilla doesn't get to wear some of the very substantial jewels! Exactly which jewels are designated only for Queen Consorts? I should know, but I'm drawing a blank.
According to Suzy Menkes' book "The Royal Jewels," Queen Victoria left the following to the Crown:
The George IV diamond diadem
The brilliant regal tiara of 1853 (which was broken up to make the Queen Mother's crown in 1937, so apparently this bequest doesn't necessarily protect the jewels in question)
The regal Indian tiara (that's the Oriental Circlet, which started out with opals but was remodelled with rubies, and was one of the tiaras used by the Queen Mother)
The Timor ruby
The Jubilee necklace and earrings (I think the Queen wears this quite often)
Several diamond collet necklaces
A diamond fringe necklace
Two pearl necklaces dating from Stuart/early Hanoverian times
A suite of amethysts belonging to Queen Victoria's mother (didn't the Queen Mother sell these?)
Twenty-one rings and four bracelets
Queen Victoria's emerald bracelet
Two diamond bow brooches
Queen Victoria's sapphire brooch
Cat's eye brooch
Various opal jewels
Five sets of earrings
Five other assorted brooches
Indian pearl necklace
Various other assorted odds and sods
Queen Mary also added some Indian jewellery to the list; apparently Queen Alexandra didn't add anything.