Share this article

SEC Moves to Halt Diamond-Linked Crypto ‘Ponzi Scheme,’ Freeze Assets

The U.S. Securities and Exchange Commission has taken action over what it alleges is a $30 million crypto scam based on supposed diamond investment.

Updated Sep 13, 2021, 9:13 a.m. Published May 21, 2019, 2:25 p.m.
Diamond

The U.S. Securities and Exchange Commission (SEC) has taken action against what it alleges is a $30 million cryptocurrency scam based around supposed diamond investment.

In a press release Tuesday, the commission alleged that defendant Jose Angel Aman operated a purported crypto business called Argyle Coin as a Ponzi scheme, using investments from new recruits to pay returns to previous investors.

STORY CONTINUES BELOW
Don't miss another story.Subscribe to the Crypto Daybook Americas Newsletter today. See all newsletters

According to the SEC complaint, Aman is said to have fleeced over 300 investors since May 2014 by selling unregistered securities in two other firms he owns: Natural Diamonds Investment Co. (Natural Diamonds) and Eagle Financial Diamond Group Inc.

He "falsely promised" investors that the firms would invest in whole diamonds to cut down and sell for substantial profits, the SEC said. He was allegedly assisted in the scheme by Harold Seigel and Jonathan H. Seigel, who also had interest in the two firms.

According to the press release:

"Aman and Jonathan H. Seigel continued the scheme by luring investors to invest in Argyle Coin, falsely claiming the investment was risk-free because it was backed by fancy colored diamonds, and promising to use investor funds to develop the cryptocurrency business. "

In fact, Aman, Natural Diamonds, Eagle and Argyle Coin, "misused or misappropriated" over $10 million of investors' money to pay other investors their supposed returns under the scheme. Aman is claimed to have also squandered the investments on personal expenses, including rent, horse purchases and riding lessons for his son.

Eric I. Bustillo, director of the SEC’s Miami Regional Office, said:

"As alleged, Aman operated a complicated web of fraudulent companies in an effort to continually loot retail investors and perpetuate the Ponzi schemes as well as divert money to himself. The SEC's diligent investigative work uncovered the Ponzi schemes and our goal is to bring justice to the harmed investors."

Judge Robin L. Rosenberg of the U.S. District Court for the Southern District of Florida has now granted the SEC’s request for a temporary restraining order and temporary asset freeze against Aman and Argyle Coin, as well as the other companies. The court has also appointed a receiver for Argyle Coin.

Natural Diamonds, Eagle, Argyle Coin, Aman, Harold Seigel and Jonathan H. Seigel face charges over securities registration violations, while Natural Diamonds, Eagle, Argyle Coin and Aman are charged with securities fraud.

The SEC said it is seeking repayment of "allegedly ill-gotten gains" and prejudgment interest, as well as financial penalties.

Diamond image via Shutterstock

More For You

Protocol Research: GoPlus Security

GP Basic Image

What to know:

  • As of October 2025, GoPlus has generated $4.7M in total revenue across its product lines. The GoPlus App is the primary revenue driver, contributing $2.5M (approx. 53%), followed by the SafeToken Protocol at $1.7M.
  • GoPlus Intelligence's Token Security API averaged 717 million monthly calls year-to-date in 2025 , with a peak of nearly 1 billion calls in February 2025. Total blockchain-level requests, including transaction simulations, averaged an additional 350 million per month.
  • Since its January 2025 launch , the $GPS token has registered over $5B in total spot volume and $10B in derivatives volume in 2025. Monthly spot volume peaked in March 2025 at over $1.1B , while derivatives volume peaked the same month at over $4B.

More For You

Bitcoin Treads Water Near $90K as Bitfinex Warns of 'Fragile Setup' to Shocks

Bitcoin (BTC) price on December 8 (CoinDesk)

BTC's relative weakness compared to stocks points to tepid spot demand, making the largest crypto vulnerable to macro volatility, Bitfinex analysts said.

What to know:

  • Bitcoin erased very modest overnight gains early Monday and spent the rest of the U.S. session in a tight range around the $90,000 level.
  • Rising long bond yields and a small U.S. equities pulling back weighed on risk appetite as traders eye this week's Federal Reserve meeting.
  • Bitfinex analysts pointed out bitcoin's relative weakness against U.S. stocks amid modest spot demand and structural softness.