Sperrylite, a rare mineral composed of platinum arsenide, is known for its brilliant metallic luster and high value among collectors. The word "sperrylite" originates from its discoverer, Francis L. Sperry, and is often used interchangeably with other terms such as platinum arsenide and nickeliferous arsenide of platinum. Other synonyms for sperrylite include palladian arsenide, palladium arsenide, and PdAs. These terms are valuable for mineralogists, geologists, and collectors in describing the various physical properties and characteristics of this unique mineral. Whatever name it goes by, sperrylite remains a highly sought-after mineral for its rarity and beauty.