A tweet including possible live images of the upcoming Galaxy S10 Plus has been submitted by the well-regarded leaker Roland Quandt. Two versions of the same phone in the same color (black) are shown. However, variations in their shade supports descriptive text that identify them as the rumored Prism Black and ceramic black SKUs of this device.
https://www.notebookcheck.net/Roland-Quandt-posts-images-of-Galaxy-S10-in-black-both-glass-and-ceramic.403746.0.html