Here is a macro shot of some of it
some of the black specks are blue upon closer examination
Well from the macro it looks like the sand has been well polished, either from surf or more likely a lapidary drum. Most of it looks like silica and quartz except the grain under the large whitish grain top center.
I don't know what sort of abrasives are used for lapidary polishing but it should have been rinsed out if you're supposed to use this with critters.
There might be limestone or bits of shell in there if it came from the beach.
Otherwise superficially it looks like the horticultural sand I get.
Grand Hotel... always the same. People come, people go. Nothing ever happens.
I have used pool filter sand without any ill effects and it is relatively cheap. Just wanted to throw that in there.
I don't want EVERY Sarracenia, just everyone that I see!!
Growlist/Wantlist Updated 2/23/12:http://terraforums.com/forums/showthread.php?t=103039
If you can see bits of seashell in it it might not be good for acid loving CPs but things that get along on neutral or slightly alkaline soils might like it. If you're unsure about it pot up something expendable and watch it or even run some water on it, let it sit overnight and then do a PH test on the water if you have any of those aquarium water testing kits.
I'm just itching for some of that sand to use on my living stones and cacti, heading out to look for some tomorrow!
$5 per 10# sack is my kinda price! Some of those aquarium gravels can be rather pricey (Flourite).
Where are you guys finding stuff marked as "horticultural sand" or is it marked as something else? The nurseries/hardware stores we have, all sell play sand or Mosser Lee's decorative "silver sand" and "desert sand". All these are extremely fine salt like grains and very quickly compact into a hard-pan mud flat in a pot. Ariocarpus fizzuratus might grow on a mud flat/flood plain in the wild but in cultivation it's not such a great thing to emulate.
I went with pool filter sand; it's what they use at UNCC. It's pure silica and it's only $8.99 for a 50 lb. bag at pool supply stores around here.