The investment company, founded by Dev Shetty, has acquired the struggling miner and its assets, including the Lulo mine in Angola.
Rare mineral specimens to go up on the block
A number of mineral specimens from estate sources will be up for sale at Bonhams “Gems, Minerals, Lapidary Works of Art and Natural History” auction scheduled to take place on May 20 in Los Angeles.

The top lot of the sale is a collection of 27 rhodochrosites, commonly known as “red gold,” ranging in hue from a light rosy color to the rare cherry-red shade. The group is expected to fetch between $200,000 and $250,000.
The rhodochrosites were mined from the Kalahari Manganese Field in South Africa, representing a collection gathered over many years from a region that is no longer producing.
The Bonhams sale also will offer a large group of varied mineral specimens from the estate of Carey A. Parshall of Stamford, Conn., obtained mostly on buying trips from the 1950s through the 1980s to Morocco, Mexico, Japan, Brazil, and India.
The collection features vanadinite, smithsonite, azurite, stibnite and zeolite.
It will also include a 228,000-carat ruby crystal in zoisite--making it the largest ruby crystal to be offered at public auction--expected to fetch between $100,000 and $150,000.
Other highlights of the sale includes an exceptionally rare and large demantoid garnet, expected to go for between $130,000 and $180,000, and a life-size obsidian carving of a bald eagle, expected to garner from $80,000 to $100,000.
Additionally, the auction will offer a multi-gemstone gold and drusy onyx necklace known as “The American Ingenuity Necklace,” designed and fabricated by Jeffrey E. Appling with an expected sale price in the range of $60,000 to $80,000.
In addition to the fine minerals, the 431-lot Bonhams auction also includes mammal, dinosaur and plant fossils; loose and rare faceted gemstones; lapidary carvings by German masters; jewelry; amber; petrified wood; meteorites; gold nuggets; and rare, natural pearls.
More information on the auction can be found at Bonhams.com.
The Latest

Smith shares wisdom he gleaned from a podcast he was listening to one morning while being walked by his dog, a Malshi named Sophie.

The counterfeit Van Cleef & Arpels jewels would have been worth more than $30 million if genuine.

Jewelers of America is leading the charge to protect the industry amidst rising economic threats.

The MJSA Mentor & Apprenticeship Program received the Registered Apprenticeship Program designation by the U.S. Department of Labor.


Casio executive and watch enthusiast Masaki Obu is the new general manager of its U.S. timepiece division.

Barabash, Verragio’s client relations representative, was a vital member of the team and is remembered as being warm and full of life.

As a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.

Originally introduced in 1992, the “Dot” collection is back with a capsule featuring five archival designs and three new creations.

Allison-Kaufman has received the honor for the fourth year in a row.

The company had a solid second quarter, with sales of non-charm jewelry outpacing sales of pieces in its core collections.

Taylor Swift dons the vibrant pair in new promotional imagery for her upcoming album, “The Life of a Showgirl,” set to release in October.

Its investment in micromechanics expert Inhotec will preserve skills essential to the watchmaking industry as a whole, said the company.

Nicolette Bianchi joins the wholesale provider with more than 15 years of cross-industry experience in marketing and product development.

Her new “Ocean” collection was inspired by Myanmar’s traditional articulated fish jewelry, with depictions of flounder, catfish, and more.

Longtime Casio executive Yusuke Suzuki is the new president and CEO of Casio’s U.S. subsidiary.

The full-day sourcing and networking event, slated for Aug. 18, will be followed by the fifth annual Mega Mixer Summer Soirée.

Model Georgina Rodríguez received a rock of an engagement ring, with her diamond estimated to be 35 carats, experts say.

The board elected 9 new directors at its recent ICA Congress in Brazil.

Three winners will receive a custom ring from Honest Hands Ring Co. inlaid with a piece of history from Denver-based distillery Stranahan’s.

JD Sports and Wawa were among the fastest-growing retail companies in the U.S. last year.

The new inventory, all untreated, features vibrant hues and unique bicolor combinations.

Acquired by a tech investor, the historic brand will continue to focus on jewelry, accessories, and timepieces.

President Donald Trump issued an executive order extending the pause on higher tariffs to November as negotiations with China continue.

The “Thunderbird Slab” collection features a thunderbird motif as a symbol of power, protection, and boundless possibility.

Columnists Jen Cullen Williams and Duvall O’Steen share tips on how to elevate your professional image.

Peter Damian Arguello, a jeweler in the Denver suburb of Wheat Ridge, was found dead inside his store in November 2023.