The Number 8 turquoise mine in Eureka County, Nevada was discovered in 1925 and first mined in 1929. Some of the largest turquoise nuggets in the world were found there. The mine was depleted in 1961. Number 8 turquoise is famous for its golden, red, brown and black distinctive spider web matrix varieties. It is bright powder blue or green in color. Number 8 is a rare and valuable turquoise.