Washington-Based Columbia Gem House Unveils Rare Winza Gem Treasures

United States jewelry News: A Striking New Offering from Tanzania

Vancouver-based wholesale gemstone supplier Columbia Gem House has revealed an exclusive new collection of untreated sapphires and rubies sourced from the mineral-rich Winza region in central Tanzania. Known for producing some of the world’s most vibrant and high-clarity gemstones, this mining area has now delivered stones that stand out for their intense colors and exceptional transparency. According to this United States Jewelry News report, the launch focuses on rare, untreated gems in hues that have become increasingly difficult to find in the global market.

A spectacular range of cut and polished sapphires from Tanzania
Image Credit: Columbia Gem House

Vibrant Hues and Rare Bicolor Creations

The collection boasts a spectrum of vivid pinks, saturated purples, fuchsias, and the coveted padparadscha sapphires, alongside true rubies. These stones owe their colors to chromium, which produces pink in lower concentrations and deep red in higher amounts. Some gems display mesmerizing natural bicolor zoning, blending red and blue to create kaleidoscopic effects that are rarely seen in commercial supply. Columbia Gem House’s sourcing team emphasized the effort required to build a dependable and ethical supply chain for this material, ensuring traceability from mine to market.

Cut for Maximum Impact

Every gemstone in this release has been expertly cut to enhance color saturation and brilliance. The initial offering includes classic shapes such as rounds, baguettes, pears, and marquise cuts, all in calibrated sizes of 4.5mm or smaller. The company noted that pink sapphire in particular has been increasingly scarce in untreated form, making this launch especially significant for jewelers and collectors.

A spectrum of naturally colored sapphires
Image Credit: Columbia Gem House

Accessible to the Trade

Wholesale buyers can view and purchase the collection through Columbia Gem House’s online platform. In addition to the pink and padparadscha tones currently available in volume, inquiries are welcome for other varieties, including blue sapphires and more unique bicolor stones.

These Winza-sourced gems reflect a broader trend in the jewelry industry toward rare, untreated, and responsibly sourced materials. For jewelers, the collection represents not only an opportunity to work with exceptional quality stones but also to appeal to consumers seeking authenticity and traceability. The market’s growing appetite for naturally vibrant and untreated gemstones is likely to keep demand high, making Columbia Gem House’s Winza treasures a timely and strategic release.

For more details, visit:

https://columbiagemhouse.com

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