Can this test semi precious gemstones such as quartz, amazonite, lapis etc?

I always test a diamond first to calibrate it. A lot depends on the temperature in your room and the stone you are testing. Once it is set and your diamond goes into the red, then test your other stones. I have found that if it is a semi precious stone there will be a movement from your starting lights by maybe one or two sections. If however the stone you are testing is glass it doesn't move at all. Cubic zirconium also moves the light. It takes a few goes to find the right settings each time because of surrounding temperature. Sorry I can't help any further....I am still learning myself!

Can it identify natural Zircon

My understanding is that it will not specifically identify zircon but would tell you the stone in question was not glass, crystal or diamond. As it works on conductivity I would expect zircon to give a high reading but not as high as diamond.

What number is for emerald?

I don't know, but the best thing to do would be to find out using a known genuine emerald - someone you know will have one. But remember that apart from diamond, a particular value will only tell you the stone has conductive properties consistent with being an emerald - it would not be a definite identification.

Can it detect gold chains aswell?

No, it will not detect gold chains since it's a gemstone detector

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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JZK Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2

JZK Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2

Product ID: 70328834

💡9+ indicator lights for precise gem ID

📏Compact 16x4x2.2cm, lightweight 100g design

🔋9V battery powered for on-the-go testing

416 DH

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Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Test Like a Pro, Shine Like a Boss!

MULTI GEM VERSATILITY - One tool tests a spectrum of precious stones—diamond, sapphire, ruby, crystal, agate, jade—no need for multiple devices.
PROFESSIONAL ACCURACY - High sensitivity sensor with 9+ lights and beep alerts delivers reliable results that build trust and confidence.
PORTABLE LIGHTWEIGHT - Sleek pen-sized design fits in your pocket or jewelry kit, empowering you to test gems anywhere, anytime.
USER FRIENDLY CALIBRATION - Easy probe calibration on glass ensures accurate readings every time, perfect for professionals and enthusiasts alike.
INSTANT GEM AUTHENTICATION - Quickly verify diamonds, sapphires, rubies & more with a simple beep and light scale.

The JZK Portable Electronic Diamond Tester Pen is a compact, battery-powered device designed for fast, accurate identification of diamonds and multiple precious gemstones. Featuring a 9+ light indicator scale and audible beep, it offers professional-grade testing for diamonds, sapphires, rubies, crystals, agates, and jade. Lightweight and easy to calibrate, this tester is ideal for jewelry professionals and enthusiasts seeking reliable, on-the-go gem verification.

Specifications

Asin	B07DHPYLCV
Best Sellers Rank	11,185 in DIY & Tools (See Top 100 in DIY & Tools) 16 in Multi Testers 229 in Jewellery Accessories
Brand	JZK
Customer Reviews	4.0 4.0 out of 5 stars (2,797) 4.0 out of 5 stars
Date First Available	3 Jun. 2018
Item Weight	110 g
Material	Plastic
Model Number	76166
Package Dimensions	17.3 x 6.9 x 4.9 cm; 110 g

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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416 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Morocco.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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