Extraordinary XL Bolivian Ametrine with Mid-Stage Etching- Anahí Mine | River Walkers Minerals Museum grade quartz framed by concentric bands of

framed by concentric bands of chalcedony before transitioning into a glittering halo of amethyst crystals

Bone fragments preserving possible feeding traces provide a rare and tangible connection to the interactions that occurred millions of years ago

Locale: Bắc Kạn Province

With excellent luster

A classic Peruvian association that beautifully showcases the contrast between brilliant metallic pyrite and glowing green fluorite

Extraordinary XL Bolivian Ametrine with Mid-Stage Etching- Anahí Mine | River Walkers Minerals Museum grade quartz framed by concentric bands ofWeight & Dimensions: 966 g 7 3. 7 2. 5 in. Locale: Anah Mine, Santa Cruz Department, Bolivia This incredible ametrine represents the second stage in the natural hydrothermal etching process. While the original crystal form is still clearly recognizable, the termination has softened and the prism faces display significantly more dissolution, revealing how mineral rich hydrothermal fluids gradually reshaped the crystal over time. The result is a