The Origin of the Term "Stealth Gem" in Modern Card Collecting

This paper formally introduces and defines the term “Stealth Gem.” A Stealth Gem refers to a high-grade collectible card (often PSA 10 or equivalent) that remains undervalued relative to its population scarcity, condition rarity, and market recognition. The concept is proposed to help collectors, investors, and analysts identify cards with disproportionately low market valuations despite strong fundamentals in grading, aesthetics, or player significance. The term and its conceptual framework are authored and documented here to establish origin and clarity within the hobby lexicon. Included in the paper is discussion of: • The origin and motivation behind the phrase Stealth Gem • Key market indicators supporting its definition • Example cases illustrating Stealth Gem dynamics • Implications for card valuation models and collector awarenes