10k Antique Onyx Wheat Brooch

This is a really unique piece! It is a large piece of onyx with a wheat decoration on the front decorated with seed pearls. I tested this by scratching the back plate and doing an acid test and it held at 10k gold. It has that antique rosey tint to it. This is a heavy brooch at 24.11 grams so I would recommend it be worn on sturdy material.