Gem or Scam?

The complete online Gem or Scam Library for enthusiasts of gemstones minerals crystals

Anytime, anywhere access to the most comprehensive collection of honest and reliable information on gemstones, minerals and rocks. Search quickly and know exactly what you are buying or selling.

Gem or Scam? Library - Stack of Stones

Do you really know what you are buying or selling?

Every day, thousands of gemstones and minerals are sold under a variety of commercial and fancy names. Some stones are treated, completely man-made, or sold under a misleading name that makes them appear to be something other than what is promised. Without proper knowledge, it is difficult to determine whether a stone is a Gem or a Scam.

What is the Gem or Scam Library?

The Gem or Scam Library is the online knowledge resource for anyone seriously interested in gemstones, minerals and rocks. Based on the book “Belazeriet of niet?” (Gem or Scam?) and expanded with many photos, videos and regular updates, this digital library offers a collection of information on more than 600 commercial and fantasy names, trademarks and synonyms. A scientific and hands-on resource with current, reliable and honest information on:

  • Synthetic or man-made gemstones and minerals;
  • Treated stones, including common forms of enhancement or manipulation;
  • Trade names and fancy names that are confusing, incorrect or misleading;
  • Natural stones whose designation or description is unclear.

The library helps you to:

What makes this library unique?

Gem or Scam? Library - Stack of Stones

What do you get?

Become a member and get instant unlimited access to the entire library
With a digital subscription, you can access a wealth of information about gemstones, minerals and rocks anytime, anywhere. You can read unlimited articles, watch videos and study detailed photos, both on your computer and via your mobile or tablet.

📌 Direct access to the enthusiast community – As a member, you are automatically part of our online community of gem enthusiasts, collectors and sellers. Share experiences, ask questions and learn from each other.

📌 Always up-to-date – The library is constantly supplemented and updated, so you are always up to date with the latest developments and new commercial names.

📌 Monthly newsletter – Stay informed about updates, new finds, background stories and other activities of Stack of Stones.

📌 No surprises or hidden costs – One flat fee per year.

👉 Become a member today and get access to honest and reliable information on gemstones, minerals and rocks

Online library

Gem or Scam?
14,99 per year
  • All information in one central location
  • Available online 24/7
  • Direct access to the enthusiast community
  • Always up-to-date
  • One fixed amount per year
  • Monthly newsletter
NEW 2025

The online ‘Gem or Scam? library’ offers much more than the book. Although the content of the book has already proven its worth with more than 1,500 copies sold (and now out of print), the market for gems and minerals continues to change constantly. In the online library, the information is regularly supplemented and updated with new commercial names, finds and market trends. In addition, the digital version includes extensive photos, videos and quick keyword searches, including clickable links and cross-references.

The library is regularly updated with the latest information on gemstones, minerals and commercial names. This keeps you always informed about the latest developments and trends in the market. Our newsletter will inform you of updates.

Yes, you can search for trade names, commercial names and even misleading terms. The library includes a comprehensive keyword list and provides scientific explanations for each name, so you know exactly what you are buying or selling.

The ‘Gem or Scam? library’ provides a reliable, evidence-based and comprehensive source of information. Unlike individual websites and books, the digital library is:

  • Always up-to-date – with regular additions of new names and market trends.
  • Fully searchable by keyword – Find what you’re looking for in seconds with clickable links and quick references.
  • Detailed and factual – No sales pitches, but objective descriptions and scientific background information.
  • All in one place – No more scattered info from different sources: here you will find scientific data, practical experience, field knowledge and trade information brought together in one convenient platform.

No, a monthly subscription is not available. However, an annual subscription gives you access to all the information in the library for only €1.25 per month. This is a minimal investment for a wealth of reliable knowledge about gemstones and minerals.

Canceling is easy via the account you create when you purchase.

  • Log in to my website and go to your account.
  • Click subscriptions and then cancel to make sure the subscription is not renewed. You will retain access to the library until the end of your subscription period.