Insights from industry

Testing Gold, Silver, and Jewelry Using the Vanta™ GX Precious Metal Analyzer


insights from industryTed ShieldsPortable Products Manager, Analytical InstrumentsEvident

In this interview, AZoM speaks with Ted Shields from Evident about the new Vanta™ GX precious metal analyzer for nondestructively testing the precious metal content, purity, and karatage of gold, silver, jewelry, and other valuables. Shields explains the key benefits and applications of the Vanta GX analyzer.

The Vanta GX analyzer replaces the GoldXpert™ countertop XRF analyzer. How does it differ from the GoldXpert instrument? 

The Vanta GX precious metal analyzer is a step forward in so many ways. The Vanta GX analyzer uses the electronic package developed for the Vanta handheld X-ray fluorescence (XRF) analyzers. These electronics are faster, more stable, and more reliable. The user interface is cleaner and more intuitive. We have also made the lid mechanism easier to use and more robust. We have learned a lot about how to build better and more reliable instruments since the GoldXpert analyzer was first designed. 


What type of user is the Vanta GX analyzer ideally suited to?

We built the Vanta GX analyzer with the jeweler, pawnbroker, or cash-for-gold dealer in mind. We designed it to look stylish on a countertop in a store or kiosk. The closed-beam system is safe for salespeople to use with their customers. When the lid opens, X-rays are turned off instantly and automatically so there is no concern about radiation exposure.

What alloys or precious metals can it analyze?

The Vanta GX analyzer provides accurate, fast, and nondestructive results for gold, silver, and platinum alloys. This includes providing accurate results for alloying elements such as copper, zinc, and nickel. We even include germanium, which is added to sterling silver to prevent tarnishing.

Is training necessary to use the Vanta GX analyzer?

Training requirements for X-ray devices are often set by local regulations. Other than the regulatory requirement, a user can learn how to use the Vanta GX software in just a few minutes. The steps are easy: simply turn on the power, log on, open the lid, place the sample, close the lid, press play, and read the result.


One of the traditional methods of testing gold is the acid scratch test. Why use XRF instead?

There are several reasons why XRF is much better than traditional methods of testing gold, the first reason being that scratch tests leave a small mark, while an XRF test with the Vanta GX is completely nondestructive.
Scratch testing also only tells you the gold concentration. An XRF test with the Vanta GX analyzer gives the user an understanding of the complete chemical makeup of all the alloying elements.
In addition, scratch testing is approximate, while an XRF test with the Vanta GX analyzer is accurate and precise.
Scratch testing does not work on silver and platinum. In contrast, an XRF test with the Vanta GX analyzer covers all precious metals. 
Scratch testing also uses hazardous chemicals that need to be disposed of after use, while an XRF test with the Vanta GX analyzer is chemical free. No hazmat handling is needed with the Vanta GX analyzer.

Can the Vanta GX analyzer be used with a PC?

In addition to being used as a standalone instrument, the Vanta GX analyzer can connect to a PC with a USB cable. We offer PC software that lets users run the Vanta GX analyzer from the PC. The larger screen of the PC makes it easy to display the results to the customer. The PC software also has auto-export and PDF features so you can make and print reports. The PDF report is customizable with your logo and contact information.

What sets the Vanta GX analyzer apart from similar gold and precious metal analyzers?

Speaking as a manufacturer, the electronics of our Vanta analyzers provide outstanding precision, accuracy, stability, and reliability. From the perspective of a user, the intuitive interface and elegant design set it apart. These combine for a value that will last for years.


Why has this new member of the Vanta series been added now?

With the economic upheaval caused by COVID-19, people have been looking to invest in the security and confidence that gold and other precious metals provide. Precious metal prices have increased, and it is more important than ever to know what your materials are made of so that you can price the pieces correctly.

Where can our readers learn more?

Contact your local representative for a demonstration of the Vanta GX precious metal analyzer or go to to learn more.  

About Ted ShieldsInterviewee

Ted has worked at Evident for more than 11 years and has overseen the introduction of numerous innovations to the XRF product lines with a focus on bringing laboratory-quality data to the portable market. Ted has a master's degree in applied physics and holds four patents.



This information, including images, has been sourced, reviewed, and adapted from materials provided by Evident.

For more information on this source, visit

Disclaimer: The views expressed here are those of the interviewee and do not necessarily represent the views of Limited (T/A) AZoNetwork, the owner and operator of this website. This disclaimer forms part of the Terms and Conditions of use of this website.


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