The Lichtenburg Diggings Museum was recently opened to the public. The main theme of the Diggings Museum are the digging for of alluvial diamonds that took place in the Lichtenburg region during 1925 – 1935. This area was known to be the richest diggings the world open to the public. In 1927, the largest pure red diamond - "pigeon blood red", was discovered here. Just outside of Lichtenburg, on the farm Grasfontein, the biggest diamond rush in history took place in March 1927, in which 25 000 runners set out to peg their claims.