Lab-Grown

NYC Diamond Dealer Accused of Lab-Grown Diamond Swaps

Lab-GrownJul 31, 2024

NYC Diamond Dealer Accused of Lab-Grown Diamond Swaps

Manashe Sezanayev faces felony charges of fraud and grand larceny for allegedly replacing three natural diamonds with lab-grown ones.

Stock image of loose polished diamonds
Manashe “Mike” Sezanayev, who operates a diamond business on 47th Street in New York City’s Diamond District, is accused of stealing $460,000 worth of natural diamonds by swapping them out for significantly less valuable lab-grown stones.
New York—A 47th Street diamond dealer faces charges of larceny and fraud for allegedly swapping out natural diamonds for lab-grown ones, the Manhattan District Attorney’s office announced late last week.

Manhattan DA Alvin Bragg Jr. said 41-year-old Manashe Sezanayev of Queens, New York, was indicted in New York State Supreme Court on two counts of second-degree grand larceny, one count of first-degree scheme to defraud—both felonies—as well as three counts of third-degree criminal possession of a forged instrument, a misdemeanor. 

Sezanayev, better known as “Mike,” operates Rachel’s Diamonds (a.k.a. Rachel’s Lab Grown Diamonds) on Manhattan’s 47th Street. 

According to court documents and statements made on the record in court, on Feb. 5, a diamond merchant came to Sezanayev’s office with two natural diamonds Sezanayev claimed to be interested in buying. 

The stones were valued at approximately $185,000 and $75,000. 

When Sezanayev turned his back to the dealer to weigh the stones on the scale, he allegedly swapped them out for two lab-grown diamonds that had been recut to mimic the natural diamonds’ weight and quality. 

The lab-grown diamonds, which are worth significantly less than their natural counterparts, also had been fraudulently inscribed with report numbers for natural diamonds graded by the Gemological Institute of America.

Sezanayev allegedly pulled off another switch the following month, according to court records.

On March 27, Sezanayev told another diamond merchant that he had a customer interested in purchasing a diamond valued at about $200,000. 

Sezanayev then allegedly purchased a lab-grown diamond that was recut to mimic the $200,000 natural diamond and inscribed with a fraudulent GIA report number. 

The following week, on April 2, the merchant met with Sezanayev and his purported customer and Sezanayev examined the diamond. 

It was only later that the merchant learned that the diamond Sezanayev returned to him was a lab- grown stone, according to court records.

Sezanayev has pleaded not guilty in the case and his attorney, Queens-based Boris Nektalov, told National Jeweler on Tuesday that his client is “awaiting his day in court.” 

 Related stories will be right here … 

In the press release announcing Sezanayev’s indictment, the Manhattan DA’s office thanked both the New York Police Department and GIA for aiding in the investigation.

A GIA spokesman said Tuesday, “We are grateful that we were able to assist the Manhattan District Attorney’s office with the investigation … For many years, GIA has provided training and investigation assistance to law enforcement in the U.S. and around the world. This is part of our mission to protect consumers and our work to meet the industry’s needs.”

He also noted that in addition to the GIA iD100, the lab’s desktop diamond tester, the lab offers four services to match a loose diamond to its GIA report.

They are: GIA Report Check; GIA Report Confirmation Service, which became available at all GIA labs earlier this year; GIA Match iD, an inscription viewing instrument that uses AI; and the lab’s Update Service, in which GIA-graded diamonds can be submitted for re-evaluation. 

The recent indictment in New York State Supreme Court is not the first time Sezanayev has been accused of a diamond-related crime.

In 2017, he was one of a dozen men charged with perpetrating a series of frauds that ultimately cheated diamond wholesalers out of more than $9 million in goods. 

He pleaded guilty to one count of conspiracy to commit wire fraud in 2018 and was sentenced to 366 days behind bars, court records show.  

According to the online database for the Federal Bureau of Prisons, Sezanayev was released from prison in December 2019. 

Michelle Graffis the editor-in-chief at National Jeweler, directing the publication’s coverage both online and in print.
tags:

The Latest

Chanel Coco Game Haute Horlogerie Chessboard
WatchesApr 21, 2026
Coco Chanel Enters the Game with New Watch Collection

Gabrielle “Coco” Chanel is a character in the “Coco Game” collection of watches and the queen in its first haute horlogerie chessboard.

Jewelers of America 20 Under 40 winners collage
IndependentsApr 21, 2026
Meet Jewelers of America’s 2026 ‘20 Under 40’ Class

The annual list honors rising professionals on the retail and supply sides of the jewelry industry.

Fake Fendi bangle
CrimeApr 21, 2026
Customs Nabs 1,500 Pieces of Counterfeit Jewelry Bound for NYC

Seized in Kentucky, the packages include fake Cartier, Tiffany & Co., Chanel, and Fendi jewelry.

Antique Jewelry & Watch Show
Brought to you by
Discover Timeless Treasures: A Showcase of Antique Jewelry & Timepieces in Las Vegas

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

Stock image of a judge’s gavel
CrimeApr 20, 2026
Queens Man Convicted in Bludgeoning Death of Pawn Shop Owner

Rodolfo Lopez-Portillo faces 25 years to life in prison after being found guilty in the March 2022 beating death of Arasb Shoughi.

Weekly QuizApr 16, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Jewelry Creators: Dynamic Duos and Generational Gems Book Cover
TrendsApr 20, 2026
Beth Bernstein, Sonia Esther Soltani Pen New Jewelry Book

“Jewelry Creators: Dynamic Duos and Generational Gems” highlights the relationships among 22 influential designers, brands, and gem dealers.

Savannah Convention Center
Events & AwardsApr 20, 2026
Atlanta Jewelry Show’s Spring Event Is Hitting the Road

The AJS Spring 2027 show will be held in Savannah, Georgia, with future shows taking place in other Southeast cities.

lvajws image 1.jpg
Brought to you by
Las Vegas Antique Jewelry & Watch Show: Showcasing the Most Collectible Merchandise from Across the Globe

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

Mike McMullen and Adrienne Gernand
MajorsApr 20, 2026
Kendra Scott Names New CFO, Chief Business Officer

The jewelry retailer plans to open 20 new stores this year and expand into new product categories.

Oscar Heyman Multi-Colored Tourmaline and Diamond Flower Necklace
TrendsApr 17, 2026
New (Groundbreaking) Floral Jewelry for Spring 2026

Flower motifs are the jewelry trend blooming amongst the new collections that debuted this spring.

QVC Group logo
MajorsApr 17, 2026
QVC Group Files for Chapter 11 Bankruptcy

The retailer reported an 8 percent decline in annual sales as it struggles under the weight of billions of dollars of debt.

Edina Kiss Devil Drop Earrings
CollectionsApr 17, 2026
Edina Kiss’ Earrings Are the Devil on Your Shoulder

The “Devil” drop earrings, our Piece of the Week, are part of designer Edina Kiss’ new namesake jewelry line that she will show at Couture.

Stock image of gold bars
CrimeApr 17, 2026
FBI Issues Warning to Refineries, Retailers Due to High Price of Gold

The alert states that burglary crews are targeting jewelry businesses and details how jewelers and refineries can protect themselves.

Cartier Roadster
WatchesApr 16, 2026
Cartier Brings Back the Roadster

The “watchmaker of shapes” debuted the reworked version of the vintage sports car-inspired timepiece at Watches & Wonders.

Edge Retail Academy Ellen Gardner, Jennifer Motes, Mona Lisa Shaffer, Cindi Haddad Drew
IndependentsApr 16, 2026
Edge Retail Academy Updates Leadership Team

As demand for jewelry retail coaching grows, the company has established a dedicated business coaching leadership team.

Stuller Mountings 2026-2027 Catalog
MajorsApr 16, 2026
Stuller’s Latest Mountings Catalog Is Out Now

The “Mountings 2026-2027” catalog showcases Stuller’s largest and most diverse assortment to date with more than 400 new mounting styles.

Screenshots of Episode 4 of the “My Next Question” podcast
PodcastsApr 15, 2026
Episode 4: The Natural Diamond Dilemma

Sally Morrison and Mark Klein discuss De Beers’ first beacon in 16 years and the mistake the industry made with lab-grown diamonds.

Randy McKenzie of Spark Creations
MajorsApr 15, 2026
Spark Creations’ Randy McKenzie Dies at 72

McKenzie spent 45 years with Spark Creations and is remembered for being kind, dedicated, and hardworking.

Rolex Cosmograph Daytona Watch
WatchesApr 15, 2026
These Are the New Rolex Watches for 2026

Rolex focused exclusively on the Oyster Perpetual this year, as the model is celebrating its 100th anniversary.

Pomellato Nudo blue topaz necklaces
FinancialsApr 15, 2026
Kering’s Jewelry Shines in Q1, Gucci’s Struggle Continues

The luxury giant discussed the Middle East conflict and its transformation plans, hinting at a stronger jewelry presence in North America.

Kalpesh Jhaveri
SourcingApr 15, 2026
Diamond Club West Coast Names 2026 Board

Kalpesh Jhaveri was re-elected as president for a third year.

Diamond Divas
TechnologyApr 15, 2026
This Jewelry Brand’s Video Series Is Up for a Webby Award

“Diamond Divas,” a social media reality series by Shahla Karimi Jewelry, is nominated in the “Best Social: Fashion & Beauty” category.

De Beers Desert Diamonds Bridal Campaign Imagery
SourcingApr 14, 2026
De Beers Expands ‘Desert Diamonds’ Beacon Into Bridal

The campaign seeks to reignite desire for natural diamond engagement rings by highlighting the “distinct character” of warm-toned diamonds.

Model wearing Bulgari Vimini necklace and earrings
FinancialsApr 14, 2026
LVMH’s Q1 Sales Sink 6% Amid Middle East Conflict

Plus, how Saks Global’s bankruptcy affected the luxury giant’s first quarter.

International Jade Summit
SourcingApr 14, 2026
International Jade Summit to Return to Monterey

Presented by Mason-Kay Jade, the summit, in its second year, will again be held during the Monterey Bay Jade Festival.

Continental Buying Group
Events & AwardsApr 14, 2026
CBG Releases Details for Las Vegas Show

The group has announced its lineup of speakers and a new “Rising Stars” pavilion.

Uniform Object Carbon Form Collection Campaign Imagery
CollectionsApr 13, 2026
Uniform Object’s New Jewelry Collection Centers on the ‘Carbon Form’

The “Carbon Form” collection explores the contrast between high and low materials, using rubber cord alongside 18-karat gold and gemstones.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy