Best Gte Gold Testers in 2026

Genuine and natural obsidian

Jet black, for the highest contrast

Smooth surface is the best way to test gold

Genuine and natural obsidian

Jet black, for the highest contrast

Smooth surface is the best way to test gold

[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.

✅【Intuitive Design】 Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results.

✅【Effortless Testing】 No need for a professional - the StillCool Diamond Tester Pen is easy to operate. Just turn it on, lightly press the tip to the gemstone, and wait for the beep to know if it's real or fake.

✅【If it's Real Diamond】The professional Diamond Tester will lighted up over 9 and emits audible sounds. No reaction means the stone is a fake crystal or simulant like cubic zirconium (CZ).

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)

Complete tool for diamonds: the package comes with 1 piece of Jewelry tester and 1 piece of Jewelry loupe, 2 pieces in total, which are complete and practical for you to test or observe diamonds, bringing you a good using experience

Clear screen design: these high accuracy diamond testers are designed with a clear screen, so you can get the useful data quickly; The item you are testing will be a true diamond when the data is above 9, and a true emerald crystal agate when the data is 7, saving your time to recognize

Multiple uses: the gold testing kit is suitable for testing various items, such as diamonds, jades, emeralds, crystals, agates, gems and so on, making it possible for you to distinguish and observe them clearly and easily

This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes.

* If the number of lights equals or exceeds 9, and it beeps, it means the diamond is true. * If the lights is about 9 and it beeps, it means the sapphire is true. * If the number is 6.5-7, it means the agate is true. * If the number is 7-8 , it means the crystal is true. * If the number is 6-7, it means the jade is true.

Before Test: 1. Put the battery in the tester. 2. Take off the probe cap. 3. Turn on the switch. 4. Make sure only one light light up on the scale. 5. Make sure the " ready lamp" light on. 6. (If test diamond, you then need to turn on the lights number corresponding to the indoor temperature and diamond weight.). 7. (If test other gems, you'd better calibrate the probe, method: by placing the probe vertically on a glass, then adjusting the light to 5, then test the gems.)

Premium Quality Black Gold Testing Stone- Smooth Surface is the Best Way to Test Gold.

Jet Black for the Highest Contrast.

Genuine and Natural Obsidian.

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

♠It is designed for quick, precise, and safe diamond testing.Harmless to diamonds.

♠Equipped with light to test flourescent reaction of stones.Flexible calibration with multi Level Volume to match different sizes of stones.

【Compatibility】: The total length of the test probe is 3.14 inches, the inner diameter is 4 mm, and the outer diameter is 6 mm. Electrical parameters: 30VAC-60VDC/MAX.1A. The standard 4mm socket to connect the banana plug can be used with most test leads.

【Durable & Strong】: The back probe is made of durable stainless steel material material, which is extremely hard and will not break easily. It is also highly conductive and will not rust, oxidize or corrode. The internal banana plug is professionally nickel-plated to effectively prevent rust and corrosion and extend the service life.

【Easy to Use】: The bottom of the test probe is free to bend. You can DIY it into any angle you want, more convenient for testing. It can easily pierce the outer skin of the cable for testing. You don't have to peel back the sheath of the cable to be able to carry out repair work, which is very fast and convenient.

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

Uses large / small switches for testing diamonds.Emits audible sounds to easily differentiate the readings.Diamond tester is use battery powered for convenience.Requires 1 standard 9v battery, which is included.

EASY READING RECORDING-This stone is used in conjunction with Gold test acids to determine if solid gold and karats. Smooth Black Glass Surface for easy reading of the test acids on this stone. This solution works for testing any gold which you believe to be 10K, 14K, 18K, 22-24K, silver, and platinum pure.

SAFE AND PERTECT-Test stones are used to test your gold jewelry without ruining it, by using the stone to test instead of directly on the piece. Apply a drop acid test on touchstone, real gold will stay on the touchstone, fake one will be dissolved or oxidized to blue. This touchstone is used to verify the gold content in items.

TOUCHSTONE-This touchstone is used to verify the gold content in items. Ideal for testing jewelry, coins, antique gold, silver, platinum collectibles. Acid changes color based on purity. Very easy to use. The natural black stone is particularly resistant to acidity, and the gold color is particularly easy to rub on the stone.