Her ability applies when equipping in a non-normal way (eg. Concealed Weapon).
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Topaz
G4Camarilla: When Topaz successfully equips from your hand, you may look at your prey's hand, and Topaz may take an equipment from it instead (discard the original equipment card).
Rulings
When using her ability, pay only for the original equipment. Neither costs nor requirements apply for the one taken from the prey's hand.