SC picks are rarely ever worth it. You usually receive about 1/2-2/3 the xp/hour you would normally get if you used a rune pick, and the deficit would be even larger if you were to use a dragon pick. SC Picks are decently fast, 100% free, and are 40k extra experience before the degrade, making them an alternative to a rune pickaxe. D Pick (imo) isn't worth it till you have ~90 Mining, however, D Pick is also highly effecient at all levels (at which it can be used =P) I don't have the time for SC though, and I'm already 83 Mining, so ... yeah. :P