The bug
When looking at the top or bottom of gilded blackstone, the top/bottom textures are similar to the side texture. This is inconsistent with the regular blackstone.
Fixed textures are attached. One with the current texture and the other is the fixed version based on MC-177801.
Linked issues
is duplicated by 3
relates to 2
Attachments
Comments 3
If you look at the top of regular blackstone, it uses a variant of the basalt top texture. I think they are pointing out that gilded blackstone does not use this top texture.

Gilded Blackstone should appear naturally with two variants, A (with all side textures, appearing if its top is covered) and B (With a top texture, appearing if its top is uncovered). Technically would work like Mushroom blocks on that behavior. Well, that would be a solution.
I don't quite undertand, how is this a glitch? Are they supposed to be different?