Carcanet, the diminutive of carcan, a chain;—it means a necklace.
Paragon of jewels enchased in a carcanet of dazzling brilliants!
But he must indeed have been in a hurry when, as would here seem, he confounded 'casket' and 'carcanet'.
On her dress was no ornament whatever, neither was there a ring on her hand, or a necklace or carcanet about her neck.
The editor was here ...