Presidium® Gem Tester II

The Presidium® Gemstone Tester / Colored Stone Estimator is the only colored gemstone thermal tester in the industry. It provides a quick and easy way to identify diamonds and separate common colored gemstones from one another based on their thermal conductivity. Coated gemstones can also be generally tested with the PGT/CSE. The Presidium® Gem Tester / Colored Stone Estimator has a retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, PGT/CSE tests diamonds as small as 0.02ct. Does not differentiate between natural and synthetic colored gemstones.

• Detachable probe pen with retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone.
• Industry’s thinnest probe tip (0.6mm) for testing diamonds as small as 0.02ct.
• Metal alert buzzer to ensure that probe tip is in contact with gemstone during testing.
• Clear and easy-to-read analog dial.
• Can differentiate between 15 types of gemstones.
• Built-in diamond and simulant test discs for reference.
• Identifies diamonds and most colored gemstones.
• Tests both polished and unpolished gemstones.
• Tests gemstones as small as 0.02ct.
• Consistent and reliable results every time.
• No waiting time between tests.
• Simple and easy to use.
• Runs on batteries.
• 2 x AAA alkaline batteries (approximately 3 hours of continuous use).

Warranties are issued by the manufacturer of an item and not our store. If an item you bought is defective within the 30 days of your purchase date, we will gladly replace it for you if a receipt is present. Otherwise, we will be more than happy to help you obtain any information you need in order to properly communicate with the manufacturer of your item. Please note that if you choose to have us correspond with the manufacturer regarding your item, there will be a shipping fee and/or a repair charge if the item's warranty is deemed to be expired. 

We want you to be happy with your purchase and would like to be transparent with our returns policy.

ONLINE returns are accepted within 30 days of the purchase date. All items must be unused and in their original packaging. To return an item, please contact us by e-mail or by phone to obtain an RMA number. We will gladly refund you in the original form of payment. Shipping costs for returns are paid for by customers unless item(s) are deemed to be defective or shipped incorrectly by us. Items that do not have a receipt will be issued a store credit if and when approved for return within the 30 days period. Please note, special orders are non-refundable and non-exchangeable.

STORE returns are accepted within 7 days of the purchase date but will be credited with a store credit. There are no cash returns on items purchased in store. Returns of damaged or defective items will be considered within 30 days of the purchase date.

Please note, any purchases made specifically for Trade Shows will not be authorized for return or exchange.