The bones could belong to a male or a female. Paramedics have also been unable to determine whether the skeleton is Thai or non-Thai.
The only clue: a gold ring on the second finger of the skeleton's left hand.
The bones were found soon after noon today by a worker who has a plantation on Nakkerd Hill, where the Big Buddha has become a major Phuket tourist attraction.
The Big Buddha lies in Chalong, a well-known district of southern Phuket.
Phuket Kusoldharm Foundation rescuers undertook a two-hour cross-country journey today to recover the bones.
The skeleton lay face down and it is estimated that the body had been there for at least a month.
X-rays and a detailed medical examination will be carried out on the skeleton at Vachira Phuket Hospital.