Premium Gold Test Stone-Made in the USA 2-1/2" X 1-1/2" X 1/4"

Premium Gold Test Stone – Made in the USA – 2-1/2" × 1-1/2" × 1/4"

This top-quality gold testing stone is an essential tool for precious metal identification. Made from natural Arkansas black novaculite quarried and cut in the USA, it is also commonly referred to as a streak stone or touchstone. Unlike cheap imitations made of glass that quickly stain and degrade, this premium stone is built to deliver reliable, long-lasting performance in professional settings.

To use, rub or scratch the item to be tested across the surface of the stone, then apply testing acid (sold separately) over the rubbing. An experienced user can determine the metal type based on the acid's reaction to the streak. For comparative karat testing, rub a known gold testing needle or verified gold sample alongside the test item's streak, then apply acid to both. A similar reaction indicates a similar karat level.

Features

• Made from natural Arkansas black novaculite – quarried and cut in the USA
• Premium quality construction resists staining and degradation
• Superior alternative to glass-based imitation test stones
• Also known as a streak stone or touchstone
• Suitable for comparative karat testing using gold testing needles or known gold samples
• Compatible with standard precious metal testing acids (sold separately)

Specifications

Notes

• Testing acid is required for use and is sold separately.
• Accurate karat determination requires experience interpreting acid reactions.
• For comparative testing, gold testing needles or verified gold samples of known karat are required and are not included.