Picasso Marble from Utah: Geological Origin, Formation, and Associated Minerals in the Grand Canyon.

Oct 16, 2024
2 min read

At the beginning of the Permian period, about 270 million years ago, western Utah was submerged under water. At that time, the Coconino Sandstone was being deposited on dry land, and the Toroweap Limestone—a complex mixture of limestone blocks, dolomite, mud, clay, and sand—accumulated in the water before being covered by the Kaibab Limestone. These geological layers can still be seen today at the rim of the Grand Canyon, a fascinating region where the history of the Earth is inscribed in its strata. Picasso Marble, sourced from Utah, is a unique stone that traces its origins to this distant geological period.

About 140 million years ago, during the Sevier orogeny—a major event in which the Farallon oceanic plate subducted beneath the North American continental plate—this collision gave rise to mountain ranges and released intense heat throughout western North America, from Canada to Mexico. The associated volcanism forced silver sulfides and other mineralized fluids into the rocks of the Star and Frisco mining areas, west of Milford, and into the Mineral Mountains east of Milford.

Marbre de Picasso, Utah, USA — Picasso Marble, Utah, USA

This volcanic phenomenon, combined with extreme pressure and heat, transformed part of the Toroweap limestone into Picasso marble, a material prized by sculptors and stonemasons worldwide for its beauty and unique colors. This marble is a true masterpiece of nature, and its rarity makes it a highly sought-after material.

Recently, a green variety of Picasso marble was discovered, and it is now available exclusively at White River Gems. This new color further enhances the appeal of this exceptional material, which continues to amaze professionals and collectors of gemstones and minerals.

Sources: Translated from the article by Dave Crosby (Mindat.org)