You can always tell when I've been playing actual games - the amount of objective markers and counters I build and paint goes up rapidly! These wyrdstone shards for Mordheim (or Song of Blades and Heroes etc.) are small rock chips on Renedra plastic bases, plus the normal sand and gravel. To paint them I started with a light basecoat, then a mix of snot green and fluoro green. I added three different washes to give them a sort of glow - watered down green ink, watered down fluoro green and finally a coat of the brilliant Citadel Nihilahk Oxide (verdigris Technical wash). They certainly stand out on the table!