So are phantoms showing in these? Plenty of Scufflin' crystals appeared like this.

I'll have you know that is a quartz and clay manicure and it cost me about $500!

Yes, many chevrons. Some quite plain on little tooth shaped milky and dark purple crystals.

A soak in leftover coffee worked better than stronger acid on the black coating. Maybe the oils in the coffee helped goo up the coating. The cluster on right was almost entirely black after soap and water soaks and scrubs. The result here was after about two hours in the coffee and scrubbing and picking. The etching in crystal faces shows up nicely when all the black is gone. Less effective on the iron stained piece on left, but still showed improvement. Now they are back in coffee overnight.

Folex needs no gloves and leaves your scrub brushes clean! No acid stains either. I'm curious if repeated soaks will get results same or better than CLR or iron out. I've used the latter in the past on heavily iron stained schist with garnets, cooking it outdoors in a thrift store crock pot. Worked fast, but turned the schist an ugly green. I used various acid and base soaks, back and forth, until I got an acceptable whitish color, then soaked in water for days.

The coffee was more of a, "there's a stale pot of coffee .  . . Why not?" I was surprised with results but I'm more impressed by Folex. Also coffee stains the cracks but washes out. Folex diluted with about four parts water softens rust stains to point where you can scrub off much, soak again, scrub off more. Next I need to buy my own jug of Folex (versus raiding the household jug) and try undiluted soaks and cooks. Folex is sold as a carpet cleaner, and it works superbly; makes just about any stain disappear as you watch. That's why I thought it might work well on rocks.