Many diamond testers do work, but it's important to understand how they work and what they are testing. Always remember that synthetic diamonds are genuine diamonds and will be identified as such by these simple testers, since their thermal and electrical conductivity values are the same as natural diamond. The original diamond testers performed a thermal conductivity test, and could distinguish genuine diamond from diamond simulants such as cubic zirconia.
However, when the new diamond simulant, moissanite, came on the market, first generation diamond testers could not identify it because its thermal conductivity values are very close to those of diamond. A second generation tester that also tests for electrical conductivity can distinguish moissanite, since moissanite conducts electricty and genuine diamond does not.
I've been collecting gemstones for a while now so I wad excited that I found a relatively cheap site to gems from. When I opened to package i was a little surprised and how small they were but it's literally marketed for jeweler's so I understand why my little square cut sapphire is the size of a crumb, but all in a ll I'm very happy with what I ordered.
Bought my first set of gemstones of gemselect to start off my collection. Everything is what it says it is, 100% legit. They even send u a pamphlet for every gem you order even the $1 ones lol. Good store.
Everything was straight forward as always. I've shopped here many times over the years and know where things are. Everything was quick and easy to find. The website is organised well. Great shopping experience.