Guild Wars 2

I forget where I got the silky sand, but I was in heart of the mists when I got it. It is a stack of 18, and when I double click it to “sift through it” it doesn’t consume the sand, doesn’t give the geodes I’m supposedly getting but does give me the coarse sand. I tabbed out of the window, logged into here, then I went to the trading post with my 19 coarse sand, didn’t sell it, but after exiting that the stack was consumed and is now at 8 instead of 18. I don’t think I could’ve had 200+ silky sand, so it was likely not a display error. As far as I can tell, the 19 coarse sand yielded acts like regular coarse sand, not disappearing when I move it or anything like that.

You consume 10 silky sand at at time and can receive (but that’s not guaranteed) geodes, ambrite, lockpicks, bandit keys and coarse sand wich is like “refined sand”, or, putting it simple, sand that you can sell on the tp and it’s used to make upgrades for guild hall.
Reward for opening silky sand is quite poor, so I guess that’s nothing wrong with your situation.
For more info:
http://wiki.guildwars2.com/wiki/Pile_of_Silky_Sand

Do you have more than one stack of sand in your inventory? When you double click on the sand it always consumes from the first stack, and not necessarily the one you clicked on. That’s caused me to think I had an infinite stack in the past.