Verify the item name in your game
The official store and developer press kit do not document a named missing-necklace quest or a fixed necklace location. That does not establish whether a necklace-shaped object appears in the game; it means these sources cannot support a precise walkthrough. Wardrobe posts from unrelated communities are not a reliable location guide.
Use the market’s visible information
If you are looking for a small accessory, note the exact stall or objective involved and inspect the surrounding area from different viewpoints. Try the matching shelf through ordinary interaction. Appropriate items are automatically selected when shelving, so you do not need to equip a specific object first.
Ask a question others can reproduce
Include the in-game name if visible, a screenshot and your progress counter when asking in the official discussion hub. Do not change save files based on a purported quest fix without verifying that it applies to this game. Start with the missing-item checklist or marketplace overview.