The bone ornaments were found in Narmetta area, on the outskirts of Hyderabad, during excavations conducted at different sites from March to May this year by the department, its director N R Visalatchy said.
"The ornaments are basically cut bone pieces, but (are) very precisely cut, all of equal shape, design, which in the 100 years of history of the department of archaeology and museums we have never come across," she said.
The bone ornaments show that the technology prevailed even then to precisely cut the bones and the mathematical sense to make them of a precise size, she said.
"It also implies a certain sense of aesthetics. (They are) clear geometrical figures with exact size. There was a certain sense of calculation, certain technology, aesthetecity involved," the official said.
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The scientific analysis of the bone pieces would throw more light on its different aspects, she said, adding that its carbon dating (determination of age or date of organic matter) would also be done.
"This will be a boost to us in having a scientific approach towards the understanding of the megalithic culture," she said.
The department, one of the oldest in the country, had undertaken many excavations in the past, she added.