#1.Presidium Gem Tester II
If you want the best gemstone tester, the Presidium Gem Tester II is the way to go in our opinion. It offers the best combination of durability, ease of use, reliability, and price. It has one of the industry’s smallest probes coming in at just 0.6mm which is capable of very small detecting gemstones. Our favorite part is that it is just easy to use, easy to read, and gives you consistent results each and every time.
Best Gemstone Tester
- #1.Presidium Gem Tester II
- #2.SmartPro SPGE-I Gem Eye I Gemstone Tester
- #3.TekcoPlus Gemstone Tester
- #4.Still Cool Diamond Tester II V2
- #5.Presidium Multi Tester III
#1.Presidium Gem Tester II
For those interested in the best gemstone tester, we have to hand it over to the Presidium Gem Tester II. This is definitely one of the industry standards and is the best value in our opinion. We like this instrument because it is incredibly precise as it can test very small gemstones down to 0.02 carats. There is also a detachable probe pen with a retractable thermoelectric probe tip.
The standout feature is probably that it has one of the industries thinnest probe tip at 0.6mm. Also, it runs on 2 AA Batteries and the battery life is actually surprisingly pretty good. Overall, this gemstone tester is simple and very easy to use. It has no waiting time between tests and gives you consistent reliable results every single time.
#2.SmartPro SPGE-I Gem Eye I Gemstone Tester
Next up, we have the SmartPro SPGE-I Gem Eye I Gemstone Tester, which is the best gemstone tester for those who already know their gemstones beforehand. In other words, this machine is definitely not good for a beginner or novice who has limited knowledge of gemstones. You will need a good background knowledge of gemstones to properly identify them.
However, if you already consider yourself very knowledgable, this instrument can be a great assistant. It is very consistent and always reliable as far as we can tell. Just keep in mind that it is a very sensitive instrument and many things can throw off your reading, such as extreme hot and cold weather, a dirty probe and clean material.
#3.TekcoPlus Gemstone Tester
Another pretty good option when it comes to the best gemstone tester is the TekcoPlus Gemstone Tester. This is definitely a nice budget friendly option for those who want something cheap and reliable. While it is certainly not as accurate or just well built as the above two brands, the TekcoPlus is definitely something respectable and will give you decently good readings.
This is a handheld device and comes with a fine elastic tipped probe used to detect various gems. In general, we find this dual diamond/moissanite tester to be surprisingly accurate. However, it does have some pitfalls, namely the pitiful battery life and the fact that you have to wait a few minutes for it to “warm up” before using it.
#4.Still Cool Diamond Tester II V2
The Still Cool Diamond Tester II V2 is a serious contender with the TekcoPlus for the best budget friendly gemstone tester. This one is seriously cheap, but does it hold up to the performance test? In general, yes, but there are a few caveats. First and foremost, it is cheaply made and we feel like it can break pretty much anytime. In fact it feels like a toy and quite unreliable.
Second, it works for many types of other stones as it tests hardness, but it doesn’t really give you that much information. There is still a lot of stuff you have to intrepret visually yourself. So is this cheap gemstone tester worth it? We think yes because it doesn’t hurt and actually helps you confirm some of your visual inspection.
#5.Presidium Multi Tester III
Finally, the last product we recommend is the Presidium Multi Tester III, which is Presidium’s handheld gemstone tester. We really like it because it is like the portable version of their tabletop device. It has a nice retractable tip and best of all there is no waiting time in between tests. It even has a built in metal detector, which is a nice little bonus.
Like its tabletop version, it is very precise and accurate and can detect diamonds as small as 0.02 ct. The user interface is also quite nice and has this nice 180 degree multi-view LED. It also has split second test results, surface mount technology, and a nice ergonomic design with a nice sturdy anti slip grip. This device definitely rivals its tabletop predecessor.