Tourmaline Ring Journal & Stationery This single-player logic game challenges

This single-player logic game challenges you to build gravity-powered marble mazes using towers

mineralogists

Bring the wonders of physics to life and inspire curiosity with every swing

study specimen

make the facts clear

Tourmaline Ring Journal & Stationery This single-player logic game challengesThis ring features natural tourmaline gemstones set in sterling silver. Tourmaline is a complex borosilicate mineral that occurs in a wide range of colors, often forming elongated, striated crystals. Details: Material: Natural tourmaline set in sterling silver (92. 5% silver, 7. 5% copper) Appearance: Vibrant, polished stone, color may vary from pink, green, or multicolored Formation: Forms in igneous and metamorphic rocks through boron rich fluids