You'll be on the hunt for multiple resources and rare items as you play Final Fantasy XIV. The types of materials you'll need to find will vary by location, but those looking to obtain Twilight Gemstones will need to visit a specific location.
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Twilight Gemstones don’t have a chance to drop at all. Instead, they only have a chance to appear during a specific activity, meaning you’ll need to work together with your favorite FFXIV party members and friends to complete it. You’ll also need to be fairly patient, as obtaining Twilight Gemstones is time-consuming and you’re not always guaranteed to get them.
The only way to get Twilight Gemstones is to make it to the Cenote Ja Ja Gural dungeon. You can only reach this location by completing Timeworn Br'aaxskin Treasure Maps in FFXIV, a rare item that can be obtained while completing Disciple of the Land activities like Mining, Botany, or Fishing. You must be level 100 at these Jobs for this item to drop.
You'll also want to make sure you do this in specific regions. Br'aaxskin Treasure Maps will not appear in any areas of FFXIV's Dawntrail expansion. You'll want to search these areas for Timeworn Br'aaxskin Treasure Maps.