Goalpara

Ureilites are a rare class of achondritic meteorite distinguished by their high carbon content, including graphite and sometimes tiny diamonds. Goalpara, found in Assam, India, is one of the earliest recognized ureilites and was important in defining the group.

The Goalpara meteorite was found in the Goalpara district of Assam, India, in the 19th century. It became one of the earliest ureilites studied by Western scientists and helped establish the ureilite class as distinct from other achondrites.

Goalpara is notable for its distinctive carbon phases, including graphite and nano-diamonds formed under high-pressure conditions. As one of the earliest ureilites recovered from the Indian subcontinent, it has been extensively studied to understand the thermal and shock history of its parent body.

Yes, some ureilites contain microscopic diamonds formed by shock events on their parent asteroid, and Goalpara has been studied for its carbon-rich phases. However, the diamonds are at a microscopic scale and not gem-quality stones.