Let me share some in-game screenshots of the latest deepslate designs (iron & gold ore, cobbled deepslate).
I’ll add details on each of the screenshots.
Continuum 2.1 alpha build 12, iron ore and gold ore in the background 
Continuum 2.1 alpha build 12, gold ore in the foreground, iron ore in the back. 
Chronos v4, gold ore and iron ore in the back in the morning sun 
MollyVX showing cobbled deepslate 
MollyVX and deepslate noncubics (slabs, stairs) 
KappaPT P6 with iron/gold ore in the moonlight. 
Chronos v4, iron and gold ores lit by sea lantern 
Nostalgia v3.0, close-up on cobbled deepslate 
Octray and cobbled deepslate 
Octray, close-up on cobbled deepslate
HardTop Vanillaccurate 