A couple of things you'll want to know about me: I consider myself something of a perfectionist, and I tend to run with ideas as far as I can take them.
I didn't like the previous treasure chest I'd designed with the Dawnbringer 32-color palette, so I went searching for inspiration again. I found it with Live-A-Live, an SNES RPG. I found a treasure chest design that intrigued me, so using its design as a base, I created another treasure chest design using the DB32 palette that I feel looks far better.
In keeping with the whole 'run ideas into the ground' thing, I then used the palette to create a number of other color schemes for the chest. (I love doing that sort of thing, if just because it's easier to do than designing and pixelling a whole item/sprite/etc.)
ANYWHO. About an hour, 27 colors (26 + transparency), Dawnbringer's 32-color palette, design inspiration via a treasure chest design from Live-A-Live (viewable on the sprite sheet stored at http://www.spriters-resource.com/snes/live/sheet/3052).
I welcome (and encourage) comments and criticism. Feel free to use this in whatever way you wish without limitation.
EDIT: Thanks to advice from the comments, I managed to drop a single color from the image (down to 25 plus transparency) and hopefully improve the contrast all over. Took about 45 minutes to finish the edits.