White bronze monuments are often very easy to find in a cemetery as their blue-grey color and hollowness easily gives them away. Their production was short-lived, but their legacy lives on as the material’s longevity and legibility makes them a desirable find for genealogists.
You can find a copy of the 1882 Monumental Bronze Co. catalog on the Internet Archive site:
Here are a few YouTube videos that talk about White Bronze Monuments: