Lab-grown diamonds were generally not considered a good investment for wealth preservation or long-term value retention when compared to natural diamonds.

Here are some key factors to keep in mind regarding the value retention of lab-grown diamonds:

1. Price Depreciation: Lab-grown diamonds typically experience price depreciation over time, similar to most consumer goods. The technology for growing diamonds has become more efficient and cost-effective, leading to lower prices for lab-grown diamonds over the years. This means that a lab-grown diamond purchased today may not hold its value as well as a natural diamond.
2. Limited History: Lab-grown diamonds have a relatively short history in the market compared to natural diamonds, which have been traded for centuries. The long-term performance and value retention of lab-grown diamonds are not as well-established.
3. Consumer Preferences: The demand for lab-grown diamonds is influenced by consumer preferences, which can change over time. While some consumers are attracted to the ethical and environmental aspects of lab-grown diamonds, others may prefer natural diamonds for their rarity and heritage.
4. Investment Purpose: Lab-grown diamonds are primarily produced for use in jewelry, not as investment vehicles. Natural diamonds, particularly those with unique characteristics and provenance, are more likely to be considered investments.
5. Certification & Grading: Lab-grown diamonds may have different certification standards and grading criteria compared to natural diamonds. Understanding these differences is important when assessing value.
6. Market & Industry Dynamics: The lab-grown diamond market and industry continue to evolve. Changes in supply, demand, and market dynamics can impact the value of lab-grown diamonds.

If you are looking for an investment with the potential for long-term value retention, natural diamonds, particularly those with exceptional characteristics and documented provenance, may be a more traditional choice.