Opal:
Opal has been a mystery for centuries. No two opals look alike. The word ‘opal’ was derived from a Greek word opallos, meaning “to see changes of color”. Opal is derived as a precious gemstone which is formed from non-crystalline silica gel. It consists of 6 to 10 per cent water and small silica spheres [...]

This is actually a question that does not have a definite answer.  The cost of spaying/neutering your puppy depends on many factors such as the age of your puppy, your location, the types of vets in your area and if your puppy has ever whelped a litter (been pregnant).
In many towns and cities, you can [...]