To date, no raw diamonds have been discovered in the geography of New Zealand.
Diamonds were first discovered in India around the 4th century BC. They were mined primarily in the Golconda region, which is present-day Telangana and Andhra Pradesh. India remained the world's sole source of diamonds until the 18th century when diamond deposits were discovered in Brazil.
No country is in the diamond discovery business. However, humans have discovered diamonds on every continent except Europe and Antarctica.
Oregon is not known for its natural diamonds.
According to Answers.com: "It is thought that diamonds were first discovered in India about 6,000 years ago in the riverbeds of the region." And "The actual mining of diamonds as an industry can be traced back to India to around 800 to 600B.C." Read more, below.
Diamonds have been part of human history for more than 6,000 years.
Since diamonds were first picked up, admired and collected nearly 6,000 years ago, the name of the person is lost to history. But most scholars believe that the first admirer probably picked up the stone in India.
diamonds
Since not all diamonds have been discovered, it is not possible to give you the answer you want.
Oregon is not known for its raw diamonds.
One must consider that by 'discovered' you mean by humans. Since it is not possible to communicate with animals or geographies, we cannot know how diamonds were regarded, considered, acknowledged -- or used -- before being discovered by humans.
Diamonds are reported to have been found in the country of India for approximately 3,000 to 6,000 years. The diamonds are mostly discovered in large mines.