You may test your pukhraj stone in Indian Gemological Institute & Gem Testing Laboratory (F-32-33, Flatted Factories Complex, Jhandewalan, Delhi - 110055, Near Jhandewalan Mata Mandir)
Beware of the Private Lab Certificate who are giving you fake certificate.
Beware of the fake Gemstone seller who are selling poor and low quality stones.
You may check your pukhraj stone with naked eye some tampered point.
Tempered Pukhraj stone gives negative energies and bring harmful effects in your life.