ALTR unveils record lab-grown pink and green diamonds at JCK 2026

By AI, Created 2:21 PM UTC, May 29, 2026, /AGP/ – ALTR introduced two world-record lab-grown fancy colored diamonds at JCK Las Vegas 2026: Kaira, a 27.19-carat pink oval, and Naira, a 20.08-carat green oval. The company says the stones show how cut and faceting can shape color as much as the growth process, pushing lab-grown diamond design beyond standard white-diamond rules.

Why it matters: - ALTR is trying to redefine what determines color in lab-grown diamonds. - The company’s Precision Color Faceting method is meant to make color a design choice, not just a growth outcome. - The two diamonds highlight a premium segment of the lab-grown market where craftsmanship and rarity drive value.

What happened: - ALTR unveiled Kaira and Naira at JCK Las Vegas 2026. - Kaira is a 27.19-carat Type IIa Fancy Intense Pink Oval and, ALTR says, the world’s largest lab-grown diamond of its kind. - Kaira measures 24.4 mm by 16.5 mm, roughly the size of a U.S. quarter. - Naira is a 20.08-carat Type IIa Fancy Vivid Green Oval and, ALTR says, the world’s largest lab-grown diamond of its kind among lab-grown and lab-created diamonds. - The company presented both stones at The Plumb Club, Booth PC-840, in Las Vegas.

The details: - Kaira took more than five months to craft. - The pink diamond has nearly 100 facets. - ALTR says each facet was calibrated to control how light and color move through the stone. - The company says the result is unusually even pink color distribution for a lab-grown fancy colored diamond of this size. - ALTR calls the effect “Color Choreography.” - Precision Color Faceting begins by mapping the path of light through a diamond before cutting starts. - The method focuses on where color should gather, soften, intensify and appear lighter. - ALTR says the process can depart from traditional gemological norms when needed to improve the finished stone’s appearance. - Ritesh Shah, co-founder and chief diamond designer, said the company is “designing” color rather than discovering it. - ALTR says its 5Cs philosophy stands for Creativity, Consistency, Calibration, Craftsmanship and Compliance. - Naira’s Fancy Vivid Green saturation at this carat weight and shape has not previously been achieved in a lab-grown diamond, according to ALTR. - Green remains one of the rarest color categories in natural and lab-created colored diamonds. - ALTR says the two stones set simultaneous world records in two rare color categories. - Kaira and Naira were named for two children of one family, according to the company. - ALTR says Kaira reflects purity and uniqueness, while Naira reflects brightness and brilliance.

Between the lines: - The launch is as much a brand statement as a product reveal. - ALTR is positioning the cutting room, not the growth chamber, as the new center of innovation in lab-grown diamonds. - The company is also leaning on history, with Founder and CEO Amish Shah noting that he introduced the first lab-grown diamond jewelry collection to the trade on the JCK stage in 2006. - That framing suggests ALTR wants to own the narrative around both technological progress and artistic differentiation.

What’s next: - Kaira and Naira remain on view at JCK Las Vegas 2026. - ALTR says New York-based press and media can arrange private preview appointments with the PR team. - The company is pushing Precision Color Faceting as a model for future lab-grown diamond design.