Karat Testing Needles - Professional Gold & Silver Verification Tools #2157329 (License: Personal Use)

This image shows a professional-grade set of four gold-testing needles mounted on a brass ring, each engraved with standard purity markings: 10K, 14K, 18K, and 999S (indicating .999 fine silver). The needles are precision-ground for consistent scratch tests against unknown samples when used with acid solutions. Their compact, portable design makes them ideal for jewelers, pawn shops, and metal recyclers needing on-the-spot alloy verification.

Used in jewelry appraisal, pawnbroking, and scrap metal evaluation to verify gold and silver purity via acid test kits; matches user intent for purchasing or learning about metal testing tools.