Best 18K Gold Testers in 2026

[Easy to Use]: Real Diamond will Emits sounds and lights >=9.

[Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.

[fast and safe ]: This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds.

JSP Premium Gold, Silver & Platinum Testing Solutions 6 x 1/2oz bottles

2 x Genuine PuriTEST Premium 2x2" PRO TOUCH Testing Stone

FREE GIFTS: 5 Gram .999 Gold Clad Test Bar & 5 Grain .999 Silver Test Bar

Genuine and natural obsidian

Jet black, for the highest contrast

Smooth surface is the best way to test gold

Everything the professionals use to test diamonds & precious metals while appraising and buying

Brand New P7 Diamond Analyzer professional jewelers test machine and gem weight guage.

Complete PuriTEST acids pack contains six (6) half-ounce bottles of test acids- 10k, 14k, 18k, 22k, Silver, and Platinum

GOLD, SILVER, AND PLATINUM JEWELRY TEST KIT

HANDCRAFTED WOOD STORAGE BOX TO PROTECT AND PROLONG TESTING SOLUTIONS

AUTHENTIC GTE 2''x 2'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

[Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.

[Intuitive Design]:LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.

[Simple to Use]:Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.

Single Bottle each of 10k, 14k, 18k, and 22k Gold Testing Solutions

Single Bottle each of Silver and Platinum Testing Solution

Quantity 2: PuriTEST Brand 2x2 PREMIUM PRO TESTING STONE

PuriTEST 3-Pack Gold Test Kit 10k, 14k & 18k Gold Acid Testing Solutions

1/2oz bottles excellent for hundreds of tests!

2x2" Premium PuriTEST PRO Test Stone

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, & PLATINUM JEWELRY IN SECONDS!

ALL-IN-ONE GOLD, SILVER, PLATINUM TESTING & APPRAISAL KIT

2 AUTHENTIC *LARGE* GTE 2''x 4'' JEWELRY TOUCHSTONES FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

This is a portable electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick, precise, and safe diamond tests.

An excellent tool kit for the diamond tester, suitable for handling any exposed or inlaid diamonds and gems, as well as other jewelry and precious metal items.

The diamond detector with voice instructions and audible sounds are emitted when the lights are on so that you can easily distinguish between masonry and stone.

World’s most user-friendly, best performing handheld electronic gold tester with unmatched accuracy

Tests all colors of gold from 6K to 24K, and also tests platinum

Immediate test results – no waiting between tests

Professional Diamond Selector II will show real diamonds or fakes，Use the big/small switch to test diamonds，Makes an audible sound to easily distinguish readings.

Easy to use：Real diamonds make sounds and lights >= 9.Fake crystal, such as cubic zirconia (CZ), crystal, glass will not emit sound and light <9.

Support battery: support mercury-free alkaline environment-friendly high-performance battery，DC 9V battery x 1 (included)

Gold Test Acid Tester Kit 10k 14k & Testing Stone

A pocket-sized, battery-operated tester that will precisely determine gold karat values equal to or greater than 10K, 14K, and 18K

Also includes testing solution Activator/Electrolyte, a latex-free eraser, cotton swabs, and also helpful instructions

Testing solutions do not come filled to the top of bottle

Tests 10k, 14k, 18k, 22k, 24k, and Platinum

Battery Operated and Includes AA Battery

No Messy Gels or Liquids

18K Yellow Gold

Use for AGT1, AGT2, AGT3 & AGT-Blue & Kee Gold Tester

6.4mm (1/4") wide

Fully portable

Battery operatec

Automatic shut-off function

This touchstone is used to verify the gold content in items

Apply a drop acid test on touchstone, real gold will stay on the touchstone, fake one will be dissolved or oxidized to blue

This solution works for testing any gold which you believe to be 10K, 14K, 18K, 22-24K, silver, and platinum pure

ALL-IN-ONE GOLD & SILVER JEWELRY TESTING & APPRAISAL KIT

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD JEWELRY IN SECONDS!

GTE 2''x 4'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

Determines gold karat values to be greater than or equal to 10K, 14K, or 18K

Safe and non-destructive testing methods

Can separate solid gold from gold plate

This EASY to use genuine GTE Test kit will determine the karat value and purity of Gold, Silver, and Platinum Jewelry, scrap, bars, coins, and much more!

- 10K, 14K, 18K, 22K, Silver, and Platinum Test Bottles with 2''x2'' Test Stone with Rubber Backing for Non-slip Desktop Testing!

- GTE 30X Triplet Silver Eye Loupe Magnifier. Perfect for Inspecting small hard to read writings on jewelry/metals.

Ideal for determining gold karat values up to 24 karat

2 year warranty

9-volt battery operated

ACID

JEWELRY

GOLD

Ideal for testing jewelry, coins, antique gold, silver, collectibles

This touchstone is used to verify the gold content in items

This solution works for testing any gold which you believe to be 10K, 14K, 18K, 22-24K, silver, and pure

Tests for 8k, 10k, 12k, 14k, & 18k

JSP GOLD JEWELRY TESTING & APPRAISAL KIT

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD JEWELRY IN SECONDS!

GTE 2''x 4'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

Each Bottle Contains .5 oz

ALL-IN-ONE GOLD, SILVER, PLATINUM, & DIAMOND JEWELRY TESTING & APPRAISAL KIT

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, AND PLATINUM JEWELRY IN SECONDS!

AUTHENTIC GTE 3''x6'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

Precisely determines gold karat values equal to or greater than 9K, 10K, 12K, 14K, 16K, 18K, 20K, 22K, and 24K.

Also includes a Testing Solution No. 1995, cotton swabs, an eraser, and a water-based varnish pencil

Tests within seconds

COMPLETE GOLD TESTING KIT: Easily test the karat content of gold with ToolTreaux’s Complete Gold Testing Kit! The kit includes four, 0.5oz shatterproof plastic squeeze bottles, a neutralizing solution and one gold testing stone; the testing solutions are potent, effective and will see you through hundreds of tests

GOLD TESTING KIT METHOD: This gold testing method is best used on gold that is yet to be smelted, due to the harsh nature of the solution that could potentially damage an already finished item; if testing fine jewelry or other finished gold items, be sure to choose an inconspicuous spot so as not to compromise the finished piece

HOW THE GOLD TESTING KIT WORKS: To test gold karat content and purity, scratch the item onto the test stone leaving a visible deposit, then place a small drop of the solution over top of deposit; if the gold is the same karat or higher the solution will not affect the deposit; if the deposit is of a lower karat, the deposit will dissolve and eventually disappear