Lilac Amethyst Geode Pair

An amethyst geode pair from Rio Grande do Sul, Brazil, in a light lilac hue. The pastel variety of amethyst is rarer than the intensely violet pieces and forms with a reduced iron concentration in the crystallizing cavity.

Amethyst is the violet variety of quartz, colored by iron trace elements and natural radiation exposure. The lilac hue indicates a lower iron concentration or a shorter radiation exposure time. Same mineralogy, different color.

Brazilian geodes from the basalt flows of Rio Grande do Sul provide a wider spectrum of amethyst hues than Uruguayan occurrences, from light lilac to deep violet. Pastel pieces like this are sought after in the collector's market as a complementary variant to the standard coloring.

Geode pairs are created by controlled splitting of the geode along its axis of symmetry. Both halves show the mirrored growth geometry of the inner wall.

A collector's item with a lighter color variant than usual.