The Enameled Snuff Bottle is the twenty-eighth treasure that can be found in Uncharted 2: Among Thieves.
The Enameled Snuff Bottle is found in Chapter 6 - Desperate Times . The next treasure is located nearby. It's actually in a rather obvious location, especially if you think back to the mission's very first treasure. When you're on the semi-circular patio with the gigantic fallen concrete pillar laying over it, head to the left, and jump over the railing so that you're standing atop the orange roof. Follow this roof forward and leftward, and in the distance, you'll see an open suitcase that must have fallen earlier. You'll see a shimmering dot in the suitcase as you approach it. Acquire the treasure from there.