Gem holding gown

[Venrid]

Wondering how much these are worth. The dress holds gems, and changes the look slightly with each different gem... for ex. this is how it looks with a faceted black diamond. Any help would be great, thanks.

A low-cut black leather gown with black diamond beads clustered at the neckline...

[Venrid]

a low-cut black leather gown with a vaalin-braced bodice

That is the look without a gem inside it.