how do you calibrate it?

Calibration is not needed as far as I know

Placing on diamonds and having no response, what does that mean?

I have used this unit and had the same response on known diamonds. Sometimes the stone is dirty and needs a cleaning. This can throw off results. Also, my unit is getting returned when I have a suitable replacement. It sometimes takes 3 or more tries to get it to register. Clean the stone and try touching it with a firm but not point grinding pressure a few times and if it doesn't work try another tester. Assuming of course you know the diamond is real.

How can I get a replacement tip?

You can get it replaced from manufacturer, fill out the return form.

Presidium Multi Tester Iii | Desertcart British Virgin Islands

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

Help Track order

Account Cart

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

Help Track order

Account Cart

$766.67

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered 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 British Virgin Islands.

Secure transaction

Description

💎 Test smarter, not harder — the ultimate gem authenticity sidekick!

DUAL DETECTION POWER - World’s first tester to identify both colorless diamonds and moissanites in one device.
ERGONOMIC PORTABLE - Rubberized anti-slip grip with lightweight design and convenient carrying case for on-the-go professionals.
RELIABLE CONSISTENT - Retractable probe ensures consistent pressure for accurate gemstone verification every time.
EFFORTLESS READABILITY - 180-degree multi-view LED display designed for both right and left-handed users.
PRECISION AT THE MICRO LEVEL - Industry’s thinnest 0.6mm retractable probe tip for testing diamonds as small as 0.02ct.

The Presidium Multi Tester III is a cutting-edge handheld device engineered to instantly distinguish genuine diamonds from moissanites and other simulants using advanced thermal and electrical detection. Featuring the industry’s thinnest 0.6mm retractable probe tip, ergonomic anti-slip grip, and a 180° multi-angle LED display, it offers unmatched precision and ease of use for professionals verifying gemstones as small as 0.02 carats.

Specifications

ASIN	B004QYR8U6
Best Sellers Rank	#71,071 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #284 in Multi Testers
Item model number	PMuT III
Manufacturer	Presidium
Product Dimensions	8.64 x 6.1 x 20.32 cm; 97 g

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.