LINK ) The joy of this company is that they can and do make the crystals in a variety of colours. Blue, Green, Purple, Yellow red and Opaque Resin . When I bought these at a show they had literally just sold all the blue to the guy in front of me so I went for the purple instead. The bases are the same resin as well but I just went for a simple desert yellow with some static grass. Nothing fancy or clever but better than leaving the bases purple!
These are the small Crystals on the left and the medium crystals on the right. From both the front and the back. In retrospect I should have put a figure in so you can judge the scale. But the small one is about 1 1/2 inches across and 1 1/2 Inches tall. So plenty big enough for space marines to hide behind. Having said space marines I will probably go down a scale and use 15mm troops.
Talking of 15mm troops I will not be posting for a few days as I am about to start a new force and am prepping them at the moment.
All the best from a dull overcast and now raining Kent!