Mason County TX: Texas topaz

Where: Texas · North America · approx. 30.76, -99.22 (vicinity only)

Why this spot: topaz (Texas state gem)

What turns up: The Llano Uplift granites of Mason County are the source of Texas blue topaz (the state gem); several ranches (Seaquist, Lindsay) offer fee digging.

Access: Permission required.

Fee-dig site: pay to dig and keep what you find. Call ahead for hours, prices and what tools are allowed.

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