Fort Sumner

Fort Sumner sits in De Baca County, New Mexico, at the northern edge of a genuinely famous quartz-crystal collecting range. Pecos diamonds — colorful, doubly terminated quartz crystals with points at both ends, like a Southwestern cousin to New York's Herkimer diamonds — form in place in outcrops of the Permian Seven Rivers Formation along the Pecos River valley, and were first recorded by Spanish explorer Don Antonio de Espejo in 1583 [1][2]. Sources describe the range as running "between Fort Sumner and Roswell" [1], but the best-documented public collecting ground — BLM land along Karr Ranch Road — sits much farther south, near Artesia in Eddy County, roughly 100 miles from Fort Sumner itself [3]. Treat this as the northern boundary of a real regional story, not a confirmed dig spot in its own right.

Fort Sumner is the county seat of De Baca County, on US Route 60/84 along the Pecos River in east-central New Mexico. The most reliably documented public collecting ground for this material — BLM land along Karr Ranch Road — is well south of Fort Sumner, near Artesia in Eddy County [3]. UNVERIFIED: no source confirms a specific accessible outcrop directly at Fort Sumner itself.

Surface and shallow-surface picking in exposed red-bed outcrops is the standard method for Pecos diamonds, since the crystals form in place and weather out of the surrounding rock. This is regional inference from documented technique elsewhere in the range, not confirmed specifically for Fort Sumner.

UNVERIFIED: land status immediately around Fort Sumner is not confirmed. Farther south near Artesia, significant public BLM land exists along Karr Ranch Road specifically for this purpose, but much of the broader Pecos River valley is private ranch land requiring permission [3]. Don't assume Fort Sumner itself has the same open BLM access documented near Artesia — confirm land ownership locally before digging.