Bullion Test

Bullion Test is a user-friendly Chrome extension that analyzes the resonance frequencies of gold and silver bullion coins to detect counterfeits. Using acoustic resonance analysis, it tests how coins "ring" when tapped, identifying authenticity by comparing expected frequency patterns specific to various bullion types.

This app supports a wide range of coins such as the American Silver Eagle, Silver Buffalo, Australian Kookaburra, Gold Maple Leaf, Morgan and Peace silver dollars, Krugerrands, and many others. A generic feature also allows testing of any 1 oz .999 silver coin by entering its diameter. The app works by recording the coin's sound via the microphone, displaying matching resonance frequencies, and providing clear indicators if the coin is genuine or possibly fake.

Ideal for collectors and investors, Bullion Test offers an affordable and accessible way to complement traditional coin authenticity tests. Note that results depend on device microphone quality and environmental noise, so performing tests in a quiet setting is recommended. This tool enhances coin verification without needing expert sound knowledge or expensive equipment.