For those who only want one or a couple of Butterflies. Howlite is a great gemstone used for carvings and beads, and then often dyed many colours. These are Howlite and dyed. They are only for use for inside mosaics. They will fade over time if you put them outside in the sun, so just for indoor work only. Their colour will remain intense and vibrant indoors. These are 35mmx25mm and about 4mm thick.
As is characteristic with Howlite, there are veins in most of the material which gives a lovely effect.