1) Marsh Adder Bracelet
Availability: The City (Stonemarket)
The exact location: While exploring the rooftops in the central part of the Stonemarket [Stonemarket - Blackfurrow], you need to locate the window shown in the above screenshots. Walk into Lady Marigold's apartment [Stonemarket - Lady Marigold's Apartment] and examine one of the paintings on the wall. By pressing the hidden switches, you will open a hidden stash with the bracelet.
2) Sootback Bracelet
Availability: chapter 1
The exact location: The Bracelet is being kept in the safe in one of the rooms, at the ground floor of the jeweler's [Serendi Jewelers - Shop]. Garrett visits this building while searching for the mask.
3) Wellpool Viper Bracelet
Availability: The City (South Quarter)
The exact location: Start in front of the South Quarter Postmaster building shown in the above screenshots, which is located to the West of the fish market [South Quarter / Riverside - Fish Hawker's Market]. Make sure that none of the enemies is coming towards Garrett, use the rope arrow on the interactive catch and reach the window located on the first floor [South Quarter / Riverside - Old Postmaster's House].
Explore the first floor and locate an interactive switch. By pressing it, you will unlock a manhole in the ceiling and allow you to climb to the building's second floor. Go towards the nearest door and, after you open it, break into the big chest, where there is the collectible.
4) Shale Snake Bracelet
Availability: chapter 4
The exact location: You can go to find the bracelet right after you meet the General in the location with the big safe [The Keep - Safe Housing]. Start avoiding the enemies who are trying to hunt you down, and explore the Northern corridor if the chamber, because it is there that the collectible is.
5) Harlequin Bracelet
Availability: The Check, Mate side-mission
The exact location: After you gain access to the Mourningside Undertaker building [Stonemarket - Archie Maxwell's House], reach the basement and locate a venting shaft entrance. After you exit at the other side, use any arrow to hit four different switches located under the ceiling. You can now climb down the rope, into the underground crypt and find the collectible.
Note - You can also visit the crypt on your own, without the necessity to complete the mission connected with it.
6) Bronzehead Bracelet
Availability: chapter 7
The exact location: Stop after you reach the main hall in the catacombs [The Hidden City - Catacomb Passages], i.e. the one where there are staying monsters. Start avoiding the hostile creatures and use one of the ropes to reach a ledge below. Use the lockpicks on the locked door and the wirecutter on the box. You can now collect the bracelet from the chest.