Lab-GrownAug 07, 2025
Chatham Releases Catalog for Loose Lab-Grown GemstonesSourcingAug 13, 2025
Columbia Gem House Launches Winza Sapphires, Rubies
The new inventory, all untreated, features vibrant hues and unique bicolor combinations.
Columbia Gem House’s new Winza sapphires and rubies are available in a variety of shapes in calibrated sizes 4.5mm and under.
Vancouver, Wash.— Wholesale gemstone supplier Columbia Gem House (CGH) has released a new collection of untreated sapphires and rubies from central Tanzania.
The new offering features a wide range of colors, including vivid pink, saturated purple, fuchsia, and padparadscha sapphires, as well as true rubies.
The stones are sourced from the Winza and surrounding mining regions, which are known for producing vibrant, high-clarity material that is rich in chromium, the element responsible for the pink color in pink sapphires and, in higher concentrations, the red hue of rubies.
Some pieces exhibit natural bicolor zoning due to chromophore variation within a single crystal. This includes blends of red and blue, some of which result in bicolor and kaleidoscope gemstones with unique color combinations.
Related stories will be right here …
The new offering features a wide range of colors, including vivid pink, saturated purple, fuchsia, and padparadscha sapphires, as well as true rubies.
Columbia Gem House has introduced a new line of sapphires and rubies from the Winza mining area in central Tanzania.
The stones are sourced from the Winza and surrounding mining regions, which are known for producing vibrant, high-clarity material that is rich in chromium, the element responsible for the pink color in pink sapphires and, in higher concentrations, the red hue of rubies.
Some pieces exhibit natural bicolor zoning due to chromophore variation within a single crystal. This includes blends of red and blue, some of which result in bicolor and kaleidoscope gemstones with unique color combinations.
Columbia Gem House’s sourcing team said establishing a dependable supply chain for this material has been an important project.
"This material meets our standards for traceability and offers exceptional quality. We're particularly excited about offering clean, richly saturated pink sapphire in a market where untreated material is increasingly rare," the team said.
The initial offering includes rounds, baguettes, pears, and marquise shapes in calibrated sizes 4.5mm and under.
Columbia Gem House said each stone has been cut for maximum color intensity and overall brilliance.
Pinks, purples, fuchsias, and padparadscha tones are available in volume online at Columbia Gem House’s website.
Registered wholesale buyers can log in to view current inventory and pricing.
For inquiries about other available colors, such as blue sapphires and bicolor or kaleidoscope stones, contact gems@columbiagemhouse.com.
More on Sourcing
The Latest
WatchesOct 29, 2026
Bucherer Opens Rolex Boutique in Washington StateThe Rolex-owned retailer’s new 4,700-square-foot store’s façade honors the Pacific Northwest’s evergreen forests.
TrendsOct 29, 2026
Amanda's Style File: All Treats, No Tricks Get into the Halloween spirit with this roundup of 13 spooky jewels.
MajorsOct 29, 2026
Gesswein Hires Longtime Bench Jeweler, Educator Ann CahoonCahoon was appointed strategic account and educational program manager at Gesswein, which recently joined Continental Buying Group.
Brought to you by
A Diamond Is Forever Launches 2026 Holiday Campaign Championing Natural DiamondsA Diamond Is Forever's holiday campaign reimagines natural diamond icons for a new generation celebrating individuality.
MajorsOct 29, 2026
Amanda Seyfried Stars In Tiffany & Co.’s Holiday CampaignTiffany & Co.’s latest ambassador makes her debut in its “Love Is a Gift” holiday campaign.
Weekly QuizOct 29, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
EditorsOct 28, 2026
These Wicked Jewels Will Cast a Spell on YouFor her annual Halloween story, Senior Editor Lenore Fedow highlights bewitching jewels fit for a witch that go from day to unholy night.
CrimeOct 28, 2026
Man In Florida Who Swallowed Tiffany & Co. Earrings ConvictedJaythan Gilder was found guilty of robbery and grand theft after stealing and then ingesting nearly $800,000 worth of Tiffany & Co. jewelry.
Brought to you by
Open an Account, Get $50 Off Your First Order. No Code Needed.Built on Relationships. Refined by Craft.
SurveysOct 28, 2026
Consumer Confidence Up in October as Gas Prices EaseConsumer confidence remains on the long-term downward trend that’s persisted over the past few years, said a Conference Board economist.
MajorsOct 28, 2026
Stuller’s Holiday Campaign Lets the ‘Magic of the Moment’ ShineThe holiday campaign includes key jewelry trends, a curated holiday gift guide, and resources to help jewelers prepare for holiday shoppers.
IndependentsOct 27, 2026
Solomon Brothers Acquires Mervis Diamond ImportersSolomon Brothers, which has three stores in the Metro Atlanta area, said it may continue to acquire other independent jewelers.
IndependentsOct 27, 2026
Gabriel & Co. Supports Charity Partner DKMS With Gala, New JewelsThe fine jewelry brand raised $2.3 million at its annual gala that supports the nonprofit’s fight against blood cancer and blood disorders.
Events & AwardsOct 27, 2026
JFC Announces 2027 ‘Facets’ HonoreesThe annual fundraising event is slated for June 6, 2027, at The Venetian Resort in Las Vegas.
CollectionsOct 26, 2026
Bliss Lau’s ‘Vantage’ Point Is the Hawaiian HorizonIn her “Vantage” collection, Lau explores heritage, identity, and inner strength through designs featuring blue-green Guatemalan jade.
MajorsOct 26, 2026
Tiffany & Co. Takes Consumers Behind the ScenesThe jeweler gave the public backstage tours of its flagship store and its design and innovation workshop as part of LVMH’s open house.
Events & AwardsOct 26, 2026
Support JFC’s ‘Monster Mash Challenge,’ If You DareVote for which jewelry professional should dress up as a monster to support Jewelers for Children’s annual Halloween fundraiser.
MajorsOct 23, 2026
PGI USA Set to Close at Year’s EndThe closure is part of a global restructuring that also includes PGI winding down its operations in Japan, South Korea, and Hong Kong.
TechnologyOct 23, 2026
JA Unveils New Website, LogoThe website offers enhanced member benefit access, industry directories, educational resources, a job board, and access to the MJSA Journal.
FinancialsOct 23, 2026
Kering’s Jewelry Sales Up Double Digits in Q3Boucheron and Pomellato had a strong third quarter, with Kering looking at jewelry as an increasingly important part of its portfolio.
CrimeOct 22, 2026
Jeweler Shot and Killed in His Suburban Cincinnati Store Tara Sinchuri was the owner of Everest Jewels in Fairfield, Ohio, and a father of three. He was found dead in his store on Tuesday.
MajorsOct 22, 2026
Neiman Marcus Has Gifts for the Jewelry Lover Who Has EverythingBespoke experiences from Buccellati and Verdura are on the retailer’s 2026 “Fantasy Gifts” list.
Events & AwardsOct 22, 2026
JIS Fall 2026 Reports Record-Breaking Attendance The number of participants at the fall show was up 12 percent.
CollectionsOct 22, 2026
Billie Eilish, Finneas Co-Design Collection for John HardyThe Academy and Grammy award-winning siblings have collaborated with John Hardy on a new jewelry line inspired by their personal style.
PodcastsOct 21, 2026
Episode 10: This Episode Is Haunted Diana Singer shared the stories of two “cursed” diamonds on this month’s podcast, which was inexplicably riddled with technical issues.
IndependentsOct 21, 2026
Gardner-Collier Jewelry to Close After 9 Decades in BusinessThe family-owned jeweler has three locations across Missouri and Iowa.
SourcingOct 21, 2026
Venetia Mines Final Carats Ahead of 2-Year ShutdownThe De Beers-owned diamond mine in South Africa is being put on ice as part of a round of previously announced cost-cutting measures.
CollectionsOct 21, 2026
Helzberg, Nordstrom Carrying New Jewelry Collection From Off-WhiteThe collection centers designs with clean geometric lines, chunky sculptural pieces, and recognizable details from the luxury fashion brand.
