By far the best of the 'cheapie' diamond testers, original Culti Diamond Selector II, made in Japan, not a Chinese copy. What's the difference? - see the article, Diamond Selector II testers - genuine or fake?
- Of the many identical-looking testers this is the original and the best quality (best build-quality, best reliability)
- Standard format, nearly everyone who has used a diamond tester is familiar with how to use this one
- Adjustable sensitivity, so you can (within limits) use it in cold conditions
- It does not test for Moissanite (a manmade stone that is not diamond) - Moissanite shows up as diamond on this tester.
- Guarantee: 1 year
See also, everything you need to know about testing diamonds in the Guide to buying diamond testers.
Turn it on, wait about 30 seconds for it to warm up, carefully set the sensitivity according to the chart on the tester, place tip in the centre of the stone, note how high (and at what speed) the LEDs light up.
Size: 6¼"X1½"X¾" 155X38X20mm
Tests stones down to 0.03ct (3pt) in size
Operating temperature: recommended between 18 and 27 degrees C (64 to 81 degrees F) but you can use it in cold conditions if you turn the sensitivity down relative to the size of stone (there is a chart of numbers on the tester to help you work this out).
Warm-up time about 30 seconds
Testing time 2 or 3 seconds
Warm-up time between tests anywhere from 3 to 8 seconds depending on the temperature
Power: one PP3 battery (supplied)
Battery life: un-tested, but certainly a few hundred tests
Auto-shut-off: none, i.e. if you forget to turn it off the battery goes flat
Low-battery indicator: none, when the lights fade or flash - change the battery.
ACCESSORIES / PRESENTATION
Vinyl carrying case
I haven't tested this on thousands of stones but I estimate that you would get a correct result 80% to 90% of the time (excluding Moissanite, which will always show up as diamond).
Developed a fault in the guarantee period (1 year): 3%
All equipment and materials must be used in conjunction with the user's skill, knowledge and experience. Under no circumstances shall QUICKTEST be liable for direct or indirect loss sustained in connection with any item. It is your responsibility to regularly check equipment against known samples, to ensure that it is working correctly.
QUESTIONS & ANSWERSAsk a Question
Is it hundred percent accurate ?
No machine made by man is 100% accurate.
To see how this model compares with the identical-looking (cheaper) Diamond selector, see the article Diamond Selector II testers - geunuine of fake?
To see how the various diamond testers compare for "what they can and can't detect", see the Guide to buying diamond testers.
Provding the stone isn't Moissanite, isn't a large-ish ruby or diamond, or isn't anything that is very cold, then I estimate that this diamond tester will give a correct answer about 95% of the time.
A more accurate diamond tester is the MULTI-EXP (currently £195.00).
The most accurate is the MULTI-SAM (currently £359.00).
The Guide to buying diamond testers will tell you which one is best for you.