NOTICE: Well each time chaos argent opens, the location of the chest will be different as you can see in the pics below
The 1st time it opens
 Chest Coordinates for the 1st Time when Chaos Argent Opens: 2219,2813|2242,2857|2209,2897|2235,2780|2278,2777|2280,2729|2272,2683|2242,2724|2196,2707|2198,2756|2217,2775|2161,2679 |2164,2779
The 2nd time it opens
 Chest Coordinates for the 2nd Time when Chaos Argent Opens: 2209,2895|2234,2847|2238,2787|2260,2776|2247,2714|2217,2773|2197,2765|2282,2747
The 3rd Time it Opens
 Chest Coordinates for the 3rd Time when Chaos Argent Opens: 2215,2900|2229,2800|2243,2791|2278,2778|2282,2747|2233,2748|2218,2774|2201,2767 HAVE FUN |