Rio Grande To Offer Calibrated Diamond Melee
The supplier’s online program allows customers to search and buy calibrated natural and lab-grown diamond melee, including in fancy shapes.

Through its new Calibrated Melee Diamond Program, customers can search and purchase calibrated melee and matched pairs of natural and lab-grown diamonds.
Customers can filter by exact specifications such as size, carat weight, and shape, ensuring consistency for both CAD-driven workflows and traditional bench fabrication, the supplier said.
Along with calibrated round melee, the comprehensive selection includes an array of fancy shapes such as oval, pear, emerald, marquise, and princess for greater design flexibility.
The offering fills a gap in the market, as calibrated fancy shapes are more difficult to source, due to cutting complexity and inconsistent size assortments, according to Rio Grande.
“Calibrating small stones by size and shape has historically been a challenge for jewelers, especially when it comes to fancy shapes, which most suppliers simply do not carry in consistent, ready-to-use assortments,” said Arien Gessner, president of Rio Grande.
“Our new calibrated melee diamond offering, including one of the industry’s most robust selections of calibrated fancy-shape melee, means customers can finally source precisely matched stones with confidence. It saves time, reduces waste, and supports our customers in delivering designs that meet the highest standards of craftsmanship.”
Rio Grande said the precision-cut melee diamonds are ideal for engagement rings, fine jewelry, high-volume production, and intricate layouts where accuracy is essential.
The new offering reflects the growing demand for fancy shapes, as well as flexible sourcing for both natural and lab-grown diamonds, according to the company.
Explore the new calibrated melee diamond selection here.
Customers must be logged in to view pricing and place orders.
The Latest

Guthrie, the mother of “Today” show host Savannah Guthrie, was abducted just as the Tucson gem shows were starting.

Butterfield Jewelers in Albuquerque, New Mexico, is preparing to close as members of the Butterfield family head into retirement.

Paul Morelli’s “Rosebud” necklace, our Piece of the Week, uses 18-karat rose, green, and white gold to turn the symbol of love into jewelry.

Launched in 2023, the program will help the passing of knowledge between generations and alleviate the shortage of bench jewelers.

The nonprofit has welcomed four new grantees for 2026.


Parent company Saks Global is also closing nearly all Saks Off 5th locations, a Neiman Marcus store, and 14 personal styling suites.

It is believed the 24-karat heart-shaped enameled pendant was made for an event marking the betrothal of Princess Mary in 1518.

Criminals are using cell jammers to disable alarms, but new technology like JamAlert™ can stop them.

The “Kering Generation Award x Jewelry” returns for its second year with “Second Chance, First Choice” as its theme.

Sourced by For Future Reference Vintage, the yellow gold ring has a round center stone surrounded by step-cut sapphires.

The clothing and accessories chain announced last month it would be closing all of its stores.

The “Zales x Sweethearts” collection features three mystery heart charms engraved with classic sayings seen on the Valentine’s Day candies.

The event will include panel discussions, hands-on demonstrations of new digital manufacturing tools, and a jewelry design contest.

Registration is now open for The Jewelry Symposium, set to take place in Detroit from May 16-19.

Lady Gaga, Cardi B, and Karol G also went with diamond jewelry for Bad Bunny’s Super Bowl halftime show honoring Puerto Rico.

Jewelry is expected to be the No. 1 gift this year in terms of dollars spent.

As star brand Gucci continues to struggle, the luxury titan plans to announce a new roadmap to return to growth.

The new category asks entrants for “exceptional” interpretations of the supplier’s 2026 color of the year, which is “Signature Red.”

The White House issued an official statement on the deal, which will eliminate tariffs on loose natural diamonds and gemstones from India.

Entries for the jewelry design competition will be accepted through March 20.

The Ohio jeweler’s new layout features a curated collection of brand boutiques to promote storytelling and host in-store events.

From heart motifs to pink pearls, Valentine’s Day is filled with jewelry imbued with love.

Prosecutors say the man attended arts and craft fairs claiming he was a third-generation jeweler who was a member of the Pueblo tribe.

New CEO Berta de Pablos-Barbier shared her priorities for the Danish jewelry company this year as part of its fourth-quarter results.

Our Piece of the Week picks are these bespoke rings the “Wuthering Heights” stars have been spotted wearing during the film’s press tour.

The introduction of platinum plating will reduce its reliance on silver amid volatile price swings, said Pandora.

It would be the third impairment charge in three years on De Beers Group, which continues to grapple with a “challenging” diamond market.























