Yes, I see where he stated it is aragonite and based on the fact that it is jbny, I am sure that his is aragonite. However, there are many other threads that state it is not:
"Kmart is probably your best bet but Kolorscape is NOT the same as southdown or oldcastle. I would never use Kolorscape in a display tank but that is just me. Look into before making your final decision. And before anybody says anything I am not saying you can’t use it I am just saying that I wouldn’t…"
and:
"Kolorscape sand is not aragonite like South Down was. It's silica sand. I used it in my old 40 breeder but I never liked the look and much prefer the way CaribSea aragonite looks (which is exactly the same as South Down used to look apparently). Also, I always seemed to have algae on my sand bed. Was that caused by the silica sand? Who knows."
However, others seem to find that it may be some type of aragonite:
"My Kolorscape is definately not silica. It disolved almost completely in some vinegar over a couple days. It looks very similar to caribsea of mixed sizes, like it's not graded to a specific size."
My thoughts are that different bags of Kolorscape may contain differing types of sand and it would be best to test it before you purchase it. It may depend on the location of packaging/shipping/warehousing, etc.
I've been pretty busy checking out aragonite sand availability, as I do need some again. A few years ago I brought over 3 or 4 pallets of Southdown sand (over 5 tons I think!) to S. California for the local reefers.
Hope this helps. I'd try to find out more about the Kolorscape and at least do the vinegar test before using it to verify that it has some aragonite.
Joyce