Gold Test Needles-Set Of Five-10K-14K-18K-22K & .999 Silver

Gold test needles are an essential tool for jewelers and precious metal buyers who need to assess the karat or fineness of gold and silver items using acid testing methods. This set of five needles covers the most commonly encountered gold karats and a fine silver standard, giving you reliable reference marks for side-by-side acid comparisons.

Features

• Set of five test needles covering four gold karats and one silver fineness
• Includes 10K, 14K, 18K, and 22K gold needles, plus a .999 fine silver needle
• Used alongside a touchstone and appropriate testing acids for comparative acid reaction testing
• Rub or scratch each needle against a test stone, place a mark from the unknown item beside it, apply testing acid, and compare reactions
• If the unknown item dissolves faster than the reference needle mark, its gold content may be lower karat; if it dissolves slower, it may be higher karat
• Silver needle requires a silver-specific test acid for accurate results
• Note: acid testing with needles is subjective and requires careful observation and practice to master

Specifications

What's Included

• 10K gold test needle
• 14K gold test needle
• 18K gold test needle
• 22K gold test needle
• .999 fine silver test needle

Notes

Acid testing with test needles is an entirely subjective method and requires careful observation and practice to master. A separate silver test acid is required when testing against the .999 silver needle. This product is subject to California Proposition 65 warnings for Lead and Phthalates.

California Prop 65 Warning:
This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm. www.P65warnings.ca.gov.