Crime

CA Man Sentenced in $147M Mining, Digital Currency Scam

CrimeJan 13, 2021

CA Man Sentenced in $147M Mining, Digital Currency Scam

Steven Chen got 10 years in prison for his role in a scheme to solicit money from investors using a fake digital currency backed by gemstones mined from non-existent sites.

Los Angeles—A California man has been sentenced to a decade in prison for his role in a scheme to cheat investors out of millions using a fake digital currency backed by gemstones.

The U.S. Attorney’s Office for the Central District of California announced Monday that 63-year-old Steven Chen of Bradbury, California pleaded guilty in June 2020 to one count of conspiracy to commit wire fraud and one count of tax evasion.

Chen was the owner and CEO of a company called U.S. Fine Investment Arts (USFIA), as well as six other companies that used the same address.

The attorney’s office said from July 2013 to September 2015, Chen, or “Boss” as he was also known, solicited investments in USFIA, ultimately obtaining about $147 million from 72,000 victims in what the office has called “one of the largest pyramid schemes ever prosecuted in [that] district.”

He falsely promoted USFIA as a successful multi-level marketing company that extracted amber and other gemstones from non-existent mines the company claimed to own in the United States, Dominican Republic, Argentina and Mexico.

Chen promoted his scam, prosecutors said, through a scheme in which compensation for recruiting other investors came primarily from new USFIA investor payments.

The investors were duped into buying investment “packages” ranging in price between $1,000 and $30,000, with each package supposedly comprised of amber and other gemstones as well as USFIA “points,” which could be converted into shares in the company when it went public.

Chen, however, never intended for the business to go public, the attorney’s office said.

USFIA also offered other bonuses, like cash, travel, luxury cars and homes, to investors who recruited others.

Starting in September 2014, Chen and others changed the promotion by offering “Gem Coins” instead of points.

They falsely ensured the coins were a legitimate digital currency backed by the company’s gemstone holdings. Chen also lied about the coins already being in wide circulation in the jewelry and finance industries.

According to prosecutors, USFIA did not generate any “significant revenue” from its business operations, apart from selling the investment packages.

It also said the amber and other gemstones provided in the packages—which Chen and his associates claimed they were mining—were bought from domestic and international suppliers and given “grossly inflated” prices.

And the “Gem Coins” were not circulated in any industry, weren’t accepted by any merchants and, essentially, have no economic value.

The

attorney’s office said Chen also committed tax evasion when he reported his gross income in 2014 as $138,015, when it was actually was about $4.8 million, for which he owes nearly $1.9 million before interest and penalties.

U.S. District Judge John F. Walter, who handled Chen’s sentencing, ordered him to pay $1.9 million in restitution to the IRS and the judge scheduled a July 16 restitution hearing for USFIA investors who were victimized in the scheme.

Meanwhile, 54-year-old Leonard Stacy Johnson of Huntington Beach, California, whom prosecutors say helped promote USFIA and Gem Coins under Chen’s direction, pleaded guilty in July 2019 to one count of tax evasion and one count of making a false statement on an immigration document.

Johnson’s sentencing is scheduled for May 24.
Brecken Branstratoris the senior editor, gemstones at National Jeweler, covering sourcing, pricing and other developments in the colored stone sector.

The Latest

trend retail.jpg
PodcastsJan 12, 2026
The latest poscast

test

Screenshot from 2026-01-12 06-22-03.png
PodcastsJan 12, 2026
New podcast without sponsor

test

20210205_Alexia_Connellan_Gatsby_earrings.jpg
TrendsJan 12, 2026
New test Article

test article

trend ss21@2x.jpg
Brought to you by
new sponsored article

test

2019_De_Beers_rough_NEW_1.jpg
PodcastsJan 12, 2026
New sponsored podcast

test

Weekly QuizOct 03, 2024
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
MNQ FINAL - NJ web - 1872 x 1052 px.png
PodcastsJan 12, 2026
Introducing My Next Question, the Podcast

A monthly podcast series for jewelry professionals

Screenshot from 2025-12-31 12-03-28.png
PodcastsDec 31, 2025
Test new podcast post

Test new podcast post

Jewelers Mutual Group Cybersecurity
Brought to you by
Navigating Cybersecurity: Essential Guidance for Jewelers

From protecting customer data to safeguarding inventory records, it's crucial to learn how to tackle cybersecurity challenges.

MNQ - studio - screen -1920 x 1080.png
PodcastsDec 29, 2025
Molly Test Podcast Episode

This is the abstract for Molly Test Podcast Episode

image 169 (4 col).png
PodcastsDec 10, 2025
Podcast With Video

Podcast Without Video or Audio or Image

image 169 (4 col).jpg
Recorded WebinarsDec 04, 2025
New Recorded Webinar for tests

New Recorded Webinar for tests

User-Avatar-PNG-Picture.png
PodcastsDec 03, 2025
Test Article Title

test Abstract

20210204_Couture_show_shot.jpg
PodcastsDec 02, 2025
New podcast

test desc

Screenshot from 2025-12-05 13-54-41.png
PodcastsNov 27, 2025
Test Podcast With Video

Test Podcast With Video. New interview with Ada Lovelace.

Image for tests
PodcastsNov 25, 2025
Test New Podcast Post

Abstract for tests. New Podcast interview with John Lennon, Jimi Hendrix and Jim Morison.

National Jeweler columnist Peter Smith
ColumnistsOct 09, 2024
Peter Smith: 7 Things to Know When Selling Luxury

Ahead of the holiday season, Smith delves into the often subconscious reasons people buy luxury products for themselves or their loved ones.

Edgar Mitchell wearing Rolex watch on Apollo 14
AuctionsOct 09, 2024
Rolex Worn on Apollo 14 Mission Up for Sale

The GMT-Master “Pepsi” belonging to astronaut Edgar Mitchell is a standout in RR Auction’s online “Space Auction,” going on now.

Simon meet me at the mall campaign
MajorsOct 09, 2024
New Simon Campaign Invites Gen Z to ‘Meet Me At The Mall’

The ads celebrate the mall culture of the ‘80s and ‘90s.

Platinum Guild International training
MajorsOct 09, 2024
PGI Launches New Virtual Sales Training

Retail sales associates can access the video series on mobile to refresh their selling skills.

Gathering at Bharat Diamond Bourse for COVID vaccinations
Policies & IssuesOct 09, 2024
GJNRF: Reaching Out, Rebuilding Futures

For 25 years, India’s Gem & Jewellery National Relief Foundation has provided aid in the wake of war, natural disasters, and global crises.

Sotheby’s A Tsar’s Treasure: Ferdinand of Bulgaria
AuctionsOct 08, 2024
Sotheby’s Selling Jewelry That Belonged to a Bulgarian Tsar

The November auction will feature a collection of jewels owned by Ferdinand I, the first king of modern Bulgaria, and his family.

Rough diamonds mined at the Diavik Diamond Mine
SourcingOct 08, 2024
Rio Tinto Begins New Phase of Production That Will Extend Diavik’s Life

Commercial production has begun underground at the Canadian diamond mine’s A21 pipe.

Stock image of hand holding phone by keyboard
SurveysOct 08, 2024
What to Know About Online Shopping This Holiday Season

Deloitte and Adobe Analytics shared their insights on the season, from the retail sales forecast to the role of generative AI.

Sylvie and Uncommon Man Campaign
CollectionsOct 08, 2024
Sylvie Adds New Men’s Bands

The Texas-based jeweler collaborated with luxury clothing brand Uncommon Man on men’s bands designed with European influences.

Diamond on polishing wheel Venus Jewel India
SourcingOct 08, 2024
Is Current Diamond Industry Turbulence Shaping a ‘New Normal’?

Industry players have found ways to cope with market conditions while working to reshape themselves in the face of emerging realities.

Rio Tinto 2024 Beyond RareTM Tender Art Series
SourcingOct 07, 2024
Rio Tinto to Offer 76 Diamonds in 2024 Beyond Rare Tender

The sales event, in its second year, features a selection of rare diamonds from the miner’s Argyle and Diavik diamond mines.

Kristi Yamaguchi and Scott Heller
CollectionsOct 07, 2024
Olympian Kristi Yamaguchi Partners With Heller Jewelers on New Collection

A portion of the proceeds from the “Always Dream” collection will go to Yamaguchi's foundation, supporting early childhood literacy.

×

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