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A Faceted Poudretteite Is So Rare Few Gemologists Will Ever Encounter One, Says GIA

Nearly flawless 9.41-carat poudretteite is the only gem of its kind in the Smithsonian’s National Gem Collection.

Published

4 years ago

October 20, 2021

Howard Cohen

TODAY STARTS AN occasional series covering the rarest gems you’ve probably never heard of. The remarkable 9.41-carat light-pink oval gem seen here is one of the largest — if not the largest — faceted poudretteite in existence, according to the Smithsonian.

A faceted poudretteite is so rare, says the Gemological Institute of America (GIA), that few professional gemologists will ever encounter one.

Poudretteite gets its name from the Poudrette family, owners and operators of a quarry near Mont Saint-Hilaire, Quebec, Canada, where a few tiny crystals of the curious material was first unearthed in the mid-1960s. It would take until 1986 for poudretteite to finally be recognized and registered as a new mineral.

In 2000, the first documented gem-quality specimen of poudretteite was discovered nearly half-a-world away in Mogok, Burma — an area famous for its pigeon’s blood rubies, as well as lapis lazuli, garnet, moonstone, amethyst, peridot and chrysoberyl. The 3-carat poudretteite was submitted to the Gubelin Gem Lab for examination, and the findings were published in the scholarly journal Gems & Gemology in 2003.

Also sourced in Burma, the much larger, nearly flawless 9.41-carat poudretteite is the only gem of its kind in the Smithsonian’s National Gem Collection. The gem was generously gifted to the Smithsonian in 2007 by Frances Miller Seay.

Poudretteite can range from colorless to purple-pink and owes its color to the presence of manganese in its chemical composition. Specimens with few inclusions and saturated color are said to be worth $6,000 per carat or more.

On the Mohs hardness scale, poudretteite rates a 5, compared to amethyst (7), topaz (8), sapphire (9) and diamond (10). The relative softness of the gem makes it unsuitable to be used in a ring, but it could be used, with care, in earrings, a pendant or pin.

Four Decades of Excellence: How Wilkerson Transformed a Jeweler's Retirement into Celebration

After 45 years serving the Milwaukee community, Treiber & Straub Jewelers owner Michael Straub faced a significant life transition. At 75, the veteran jeweler made a personal decision many business owners understand: "I think it's time. I want to enjoy my wife with my grandchildren for the next 10, 15 years." Wilkerson's expertise transformed this major business transition into an extraordinary success. Their comprehensive approach to managing the going-out-of-business sale created unprecedented customer response—with lines forming outside the store and limits on how many shoppers could enter at once due to fire safety regulations. The results exceeded all expectations. "Wilkerson did a phenomenal job," Straub enthuses. "They were there for you through the whole thing, helped you with promoting it, helping you on day-to-day business. I can't speak enough for how well they did." The partnership didn't just facilitate a business closing; it created a celebratory finale to decades of service while allowing Straub to confidently step into his well-earned retirement.