I picked this up over the week. It is 24cm in height and 15cm at its widest. I am terrible with colours but it seems to go from a golden amber? through to red with yellow and clear. I have used the UV light on it but it is very low on power (no extra Batteries to be found !) In the pictures below the yellow turns bright orange and the clear has the green glow. Any clues as to maker and age please.