But what about the white appearance? This one was white and the other one was dark brown (so neither were jade-green or clear). Also, neither where shiny (more of a matte, non-gloss)

The empty chrysalises lose some of the glossiness (and all of the bright color) that they have when the developing butterfly is inside. They're kind of like a layer of skin that's sloughed off.

The empty monarch chrysalises I've seen have all looked basically like the one in your photo.

I don't know about the dark brown one; there may be some natural variation, and some diseased monarch chrysalises turn dark brown/black.

I appreciate your help. This looks like a positive ID. I did find some pictures at the below link that also look similar to my picture.

https://pickmeyard.wordpress.com/category/butterflies/

I noticed another butterfly that has a similar appearance chrysalis. We apparently have these too in our area.

Yes, it's a possibility.

They're closely related (same genus).