Like all quartz, amethyst is fairly hard, making it perfect to wear as jewelry, which humans have been doing for thousands of years. Amethyst is often found in geodes within organic rocks.

Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

Geodes and jewellery Some of the world’s most stunning geodes are amethysts. If you collect crystals, you might want to add an amethyst geode in your collection for its sheer beauty.

Amethyst geodes—some stretching 5 m long—dot the ancient lava flows of Uruguay’s Los Catalanes mining area. The geodes contain calcite, colorless quartz, and agate, another quartz mineral.

Amethyst typically forms inside geodes, hollow rocks lined with crystals. Over time, mineral-rich solutions seep into these cavities, allowing crystals like amethyst to grow.

Amethyst is a violet variety of quartz which has been used as a gemstone for many centuries and is a key economic resource in northern Uruguay. Geodes are hollow rock formations often with quartz ...

Colossal crystals, gigantic geodes: Selling ‘mind-boggling’ collection no easy task Originally published February 27, 2016 at 8:00 am Updated February 27, 2016 at 12:48 pm ...

Amsterdam-based NL Architects is envisioning a chain of striking hotel towers with a design based on the ‘positive powers’ of amethyst, a variety of quartz used in jewellery.