Lindsay Ranch (Bar M), Mason

Where: Texas · North America · approx. 30.7, -99.15 (vicinity only)

Why this spot: Precambrian Llano uplift granite

What turns up: Blue topaz and clear topaz in decomposed granite and creek gravels

Access: Open / legal.

Private ranch fee dig near Mason; keep your finds.

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.