Sonoran Gold Turquoise (Campitos, Cananea, Sonora): Field Guide

Rock & Gem (2024) places Campitos turquoise in the mountains of Cananea, “some 35 miles from the U.S./ Mexico border and approximately 150 miles southeast of Tucson, Arizona.” Stagecoach Jewelry (2019) puts the Sonoran Gold mine at Campitos Mountain, just outside the city. ^{[1], [2]}

Cananea is copper country. Its Buenavista open-pit copper mine has been worked continuously since 1899 (Wikipedia, “Buenavista mine”). Stagecoach Jewelry (2019) writes that turquoise “has long been a by-product of these mines.” No source ties Sonoran Gold to the Buenavista pit itself. ^{[7], [2]}

Jorge Ruvalcaba told Rock & Gem (2024) that his family owns three of the four “pipelines” in the area and works them as Turquoise Mining Co. The work is done “a mile up in the mountains,” without heavy machinery, which regulations prohibit. On an average day about 50 people are on the ground, and as many as 200 at peak. Output has fallen from about a ton of stone a week to 400 to 500 pounds. ^[1]

“We used to throw away a lot of material, such as the Sonoran gold turquoise. Nobody wanted it. We stabilized it and now it's very famous.”
— Jorge Ruvalcaba, in Rock & Gem (2024) ^[1]

The Ruvalcabas work most of the claims; no source says whether every stone sold as Sonoran Gold comes from theirs.

Stagecoach Jewelry described it in March 2019 as “a brand new stone that just hit the market.” Rock & Gem (2024) and Durango Silver Co. date its arrival to 2019 or 2020. ^{[2], [1], [3]}

It forms as individual nuggets in clay rather than in veins (Stagecoach Jewelry 2019; Turquoise Matrix). Silver Sun describes clay-coated nuggets, a by-product of local copper mining. ^{[2], [5], [4]}

Durango Silver Co. describes aqua blue, lime green and two-tone blue-and-green stone with a golden to brown matrix. At the high grade, the color fades from baby blue to lime green across a yellow spiderweb matrix. Stagecoach Jewelry (2019) notes that specks of pyrite are not uncommon. ^{[3], [2]}

The “gold” in the name is the color of the matrix. It has nothing to do with the metal.

The rough is soft. Durango Silver Co. and Silver Sun both say most Sonoran Gold is stabilized or Zachery-treated before it is set. We found no source that sells it as natural. ^{[3], [4]}

Rock & Gem (2024) quotes GIA on the Zachery process: it improves the stone’s ability to take a polish, decreases its porosity, and “does not involve impregnation with a polymer.” The same article notes that it is illegal to sell treated turquoise as natural. ^[1]

Assume a Sonoran Gold stone is enhanced unless its seller documents otherwise.