Very nice! You might need make a snoot and grid for small subje

WoW!! Very impressive for your collection and pictures (first time to be strobist!!)

You don't have to buy PW, overpriced. Cactus is enough for you. I never use Canon proudct before but I know 430 is the classic of classic. 580 is even better?

I will try to finish my blog sooner, (DIY and Restricting light). For small subject, you need DIY Snoot and Grid. Or don't aim to stones directly but probably aim to a white paper (above the stones with some angles) first and then bounce it to stones.

What's under the stone? Seems too reflective.