* Twin Knob 1 for sale 69.33 acres next to Crater of Diamonds State Park, Pike County, Murfreesboro, Arkansas USA access paved Hwy 301.
* Twin Knob 1 is located just south of the Ouachita Mountains & along the northern margin of the West Gulf Coastal Plain
* It is 2.4 miles (3.8 km) southeast of Murfreesboro, Pike County, Arkansas USA, situated 800 yards east-northeast of the Prairie Creek diamond pipe in the Crater of Diamonds

The Twin Knob 1 diatreme (TK1), delineated in 1981, is located 2,4 miles (3,8 km) southeast of Murfreesboro, Pike County, Arkansas USA & is within the northeast-trending group of pipes. plugs & dikes that comprise the Murfreesboro district. TK1 is an elongate , bilobate pipe oriented north-south. The diatreme penetrated the Lower cretaceous Trinity Formation, whereas the Upper Cretaceous Tokio Formation overlies portions of the pipe. These relationships suggest an emplacement age of early late Cretaceous, which is contemporaneous with isotopic ages obtained at the Prairie Creek lamprorite complex.

Diamonds were discovered in Arkansas in 1906, when a farmer named John Wesley Huddleston found a "glittering pebble on his property. The next year the New York Times described "Diamond of John's" treasure in epic terms: The story of the discovery of diamond fields in one of the poorest counties of Arkansas reads like a chapter of Sinbad's adventures.

Since that time, various efforts have been made to mine diamonds, but due to inadequate funding & a lack of experience, all failed sooner or later.

A lot of funny business has gone on around the Arkansas diamond fields over the past century. After failing to gain full control of the area in 1910, the London-based Diamond Syndicate allegedly set up a sham operation to downplay the mine's potential & sabotage production, according to a Justice Department Investigation,. In 1919, two rival processing plants burned to the ground on the same January night, fueling rumors that someone was out to destroy the mines's profitability. In the late 1920's, Henry Ford was set to buy Arkansas industrial diamonds for his assembly lines, but the Diamond Syndicate & DeBeers bribed the mine's owner to keep it out of commission.

Ford's interest in Arkansas diamonds was based on the fact that they lasted longer in the industrial grinding & polishing processes than diamonds from other countries. Shenanigans continued into the 1950's, when. for instance, an entrepreneur trucked some gravel from the diamond field to his own five acres north of town &plunked down a sign claiming he had a diamond mine. Locals found him beaten up in a ditch the next morning, according to a story one Arkansas geologist has told over the years.

The Twin Knobs 1 property has been owned by the same family since before the discovery of diamonds.