Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Silver Wire & Tubing & Rivets rhodium plated Platinum Alloy 950

rhodium plated Platinum Alloy 950 platinum / 5% ruthenium Country of Origin USA Available Options

use punches sized to match the depression being used

This model is similar to the HMR-102 but features larger faces

progressing through a series of graduated sizes

mountings are sold without stones

Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Silver Wire & Tubing & Rivets rhodium plated Platinum Alloy 950Gold Test Needles Set of Five (10K, 12K, 14K, 18K & 22K) This professional set of gold test needles includes five needles, each tipped with a different karat of gold, allowing jewelers and metalsmiths to perform comparative acid testing across the most common gold purities. By rubbing each needle against a test stone alongside an unknown gold item, then applying testing acid to both marks, you can observe and compare the acid reactions to estimate the