I somehow doubt this is it, but the Manhattan Museum of Modern Art has an exhibit about clever safety objects, and one of the items is a bulletproof black rose brooch
The exhibit site is interactive and there are two ways to find a picture.
First, go to:
http://www.moma.org/exhibitions/2005/safe/safe.html
After clicking "Begin", you'll see a field of single plant sprouts, in earthen mounds. If you click on a mound, you'll zoom in and see a few of the exhibit items. The rose is on on the mound directly between the mound with a grass lawn and picket fence, and the mound that has molten lava on it.
Or, you can click on "Index" in the lower right corner, and browse for "Ballistic Rose" under the B. That's a lot less fun.
Here's the credits:
<i>Ballistic Rose Brooch
By Tobias Wong
Ballistic Nylon, Velvet Leaves and silver pin
5” Diameter
Manufactured by Conduit Group USA </i>