Soluble or insoluble?

In the picture attached [here](https://i.ytimg.com/vi/UMqPKQKamhk/hqdefault.jpg), is the compound in water soluble or insoluble? 


I get confused while identifying solubility of a solute in a solvent when a situation like this arrises. The crystals of the solid have become liquid, but they give a certain transluscent white colour to the solvent (water in this case). So in this picture, is the solute soluble in water?


